Clean up ignores that are not ignoring anything (#78484)

packages/flutter/lib/src/animation/curves.dart

@@ -1304,7 +1304,6 @@ class ElasticInOutCurve extends Curve {
 class Curves {
   // This class is not meant to be instatiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   Curves._();
 
   /// A linear animation curve.

packages/flutter/lib/src/cupertino/colors.dart

@@ -20,7 +20,6 @@ import 'theme.dart';
 class CupertinoColors {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   CupertinoColors._();
 
   /// iOS 13's default blue color. Used to indicate active elements such as

packages/flutter/lib/src/cupertino/icons.dart

@@ -33,7 +33,6 @@ import 'package:flutter/widgets.dart';
 class CupertinoIcons {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   CupertinoIcons._();
 
   /// The icon font used for Cupertino icons.

packages/flutter/lib/src/cupertino/route.dart

@@ -211,10 +211,7 @@ mixin CupertinoRouteTransitionMixin<T> on PageRoute<T> {
       child: child,
     );
     assert(() {
-      // `child` has a non-nullable return type, but might be null when
-      // running with weak checking, so we need to null check it anyway (and
-      // ignore the warning that the null-handling logic is dead code).
-      if (child == null) { // ignore: dead_code
+      if (child == null) {
         throw FlutterError.fromParts(<DiagnosticsNode>[
           ErrorSummary('The builder for route "${settings.name}" returned null.'),
           ErrorDescription('Route builders must never return null.'),

packages/flutter/lib/src/cupertino/text_selection_toolbar.dart

@@ -358,8 +358,7 @@ class _CupertinoTextSelectionToolbarContent extends StatefulWidget {
     required this.toolbarBuilder,
     required this.children,
   }) : assert(children != null),
-       // This ignore is used because .isNotEmpty isn't compatible with const.
-       assert(children.length > 0), // ignore: prefer_is_empty
+       assert(children.length > 0),
        super(key: key);
 
   final Offset anchor;

packages/flutter/lib/src/foundation/isolates.dart

@@ -44,6 +44,4 @@ typedef _ComputeImpl = Future<R> Function<Q, R>(ComputeCallback<Q, R> callback,
 ///
 /// The `debugLabel` argument can be specified to provide a name to add to the
 /// [Timeline]. This is useful when profiling an application.
-// Remove when https://github.com/dart-lang/sdk/issues/37149 is fixed.
-// ignore: prefer_const_declarations
-final _ComputeImpl compute = _isolates.compute;
+const _ComputeImpl compute = _isolates.compute;

packages/flutter/lib/src/foundation/licenses.dart

@@ -288,7 +288,6 @@ class LicenseEntryWithLineBreaks extends LicenseEntry {
 class LicenseRegistry {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   LicenseRegistry._();
 
   static List<LicenseEntryCollector>? _collectors;

packages/flutter/lib/src/foundation/unicode.dart

@@ -13,7 +13,6 @@
 class Unicode {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   Unicode._();
   /// `U+202A LEFT-TO-RIGHT EMBEDDING`
   ///

packages/flutter/lib/src/gestures/converter.dart

@@ -35,7 +35,6 @@ int _synthesiseDownButtons(int buttons, PointerDeviceKind kind) {
 class PointerEventConverter {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   PointerEventConverter._();
 
   /// Expand the given packet of pointer data into a sequence of framework

packages/flutter/lib/src/material/chip.dart

@@ -62,7 +62,6 @@ const Icon _kDefaultDeleteIcon = Icon(Icons.cancel, size: _kDeleteIconSize);
 abstract class ChipAttributes {
   // This class is intended to be used as an interface, and should not be
   // extended directly; this constructor prevents instantiation and extension.
-  // ignore: unused_element
   ChipAttributes._();
 
   /// The primary content of the chip.
@@ -203,7 +202,6 @@ abstract class ChipAttributes {
 abstract class DeletableChipAttributes {
   // This class is intended to be used as an interface, and should not be
   // extended directly; this constructor prevents instantiation and extension.
-  // ignore: unused_element
   DeletableChipAttributes._();
 
   /// The icon displayed when [onDeleted] is set.
@@ -315,7 +313,6 @@ abstract class DeletableChipAttributes {
 abstract class CheckmarkableChipAttributes {
   // This class is intended to be used as an interface, and should not be
   // extended directly; this constructor prevents instantiation and extension.
-  // ignore: unused_element
   CheckmarkableChipAttributes._();
 
   /// Whether or not to show a check mark when
@@ -351,7 +348,6 @@ abstract class CheckmarkableChipAttributes {
 abstract class SelectableChipAttributes {
   // This class is intended to be used as an interface, and should not be
   // extended directly; this constructor prevents instantiation and extension.
-  // ignore: unused_element
   SelectableChipAttributes._();
 
   /// Whether or not this chip is selected.
@@ -462,7 +458,6 @@ abstract class SelectableChipAttributes {
 abstract class DisabledChipAttributes {
   // This class is intended to be used as an interface, and should not be
   // extended directly; this constructor prevents instantiation and extension.
-  // ignore: unused_element
   DisabledChipAttributes._();
 
   /// Whether or not this chip is enabled for input.
@@ -510,7 +505,6 @@ abstract class DisabledChipAttributes {
 abstract class TappableChipAttributes {
   // This class is intended to be used as an interface, and should not be
   // extended directly; this constructor prevents instantiation and extension.
-  // ignore: unused_element
   TappableChipAttributes._();
 
   /// Called when the user taps the chip.

packages/flutter/lib/src/material/colors.dart

@@ -196,7 +196,6 @@ class MaterialAccentColor extends ColorSwatch<int> {
 class Colors {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   Colors._();
 
   /// Completely invisible.

packages/flutter/lib/src/material/elevation_overlay.dart

@@ -13,7 +13,6 @@ import 'theme.dart';
 class ElevationOverlay {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   ElevationOverlay._();
 
   /// Applies an overlay color to a surface color to indicate

packages/flutter/lib/src/material/feedback.dart

@@ -84,7 +84,6 @@ import 'theme.dart';
 class Feedback {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   Feedback._();
 
   /// Provides platform-specific feedback for a tap.

packages/flutter/lib/src/material/icons.dart

@@ -134,7 +134,6 @@ class _PlatformAdaptiveIcons {
 class Icons {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   Icons._();
 
   /// A set of platform-adaptive material design icons.

packages/flutter/lib/src/material/refresh_indicator.dart

@@ -434,10 +434,7 @@ class RefreshIndicatorState extends State<RefreshIndicator> with TickerProviderS
               ));
             return true;
           }());
-          // `refreshResult` has a non-nullable type, but might be null when
-          // running with weak checking, so we need to null check it anyway (and
-          // ignore the warning that the null-handling logic is dead code).
-          if (refreshResult == null) // ignore: dead_code
+          if (refreshResult == null)
             return;
           refreshResult.whenComplete(() {
             if (mounted && _mode == _RefreshIndicatorMode.refresh) {

packages/flutter/lib/src/painting/_network_image_web.dart

@@ -92,7 +92,7 @@ class NetworkImage
         chunkCallback: (int bytes, int total) {
       chunkEvents.add(ImageChunkEvent(
           cumulativeBytesLoaded: bytes, expectedTotalBytes: total));
-    }) as Future<ui.Codec>; // ignore: undefined_function
+    }) as Future<ui.Codec>;
   }
 
   @override

packages/flutter/lib/src/painting/image_provider.dart

@@ -674,10 +674,7 @@ abstract class AssetBundleImageProvider extends ImageProvider<AssetBundleImageKe
       PaintingBinding.instance!.imageCache!.evict(key);
       rethrow;
     }
-    // `key.bundle.load` has a non-nullable return type, but might be null when
-    // running with weak checking, so we need to null check it anyway (and
-    // ignore the warning that the null-handling logic is dead code).
-    if (data == null) { // ignore: dead_code
+    if (data == null) {
       PaintingBinding.instance!.imageCache!.evict(key);
       throw StateError('Unable to read data');
     }

packages/flutter/lib/src/painting/matrix_utils.dart

@@ -14,7 +14,6 @@ import 'basic_types.dart';
 class MatrixUtils {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   MatrixUtils._();
 
   /// Returns the given [transform] matrix as an [Offset], if the matrix is

packages/flutter/lib/src/painting/text_span.dart

@@ -343,10 +343,7 @@ class TextSpan extends InlineSpan {
     assert(() {
       if (children != null) {
         for (final InlineSpan child in children!) {
-          // `child` has a non-nullable return type, but might be null when
-          // running with weak checking, so we need to null check it anyway (and
-          // ignore the warning that the null-handling logic is dead code).
-          if (child == null) { // ignore: dead_code
+          if (child == null) {
             throw FlutterError.fromParts(<DiagnosticsNode>[
               ErrorSummary('TextSpan contains a null child.'),
               ErrorDescription(
@@ -459,7 +456,7 @@ class TextSpan extends InlineSpan {
       // warning that the null-handling logic is dead code).
       if (child != null) {
         return child.toDiagnosticsNode();
-      } else { // ignore: dead_code
+      } else {
         return DiagnosticsNode.message('<null child>');
       }
     }).toList();

packages/flutter/lib/src/rendering/box.dart

@@ -1398,10 +1398,7 @@ abstract class RenderBox extends RenderObject {
   @mustCallSuper
   double getMinIntrinsicWidth(double height) {
     assert(() {
-      // `height` has a non-nullable return type, but might be null when
-      // running with weak checking, so we need to null check it anyway (and
-      // ignore the warning that the null-handling logic is dead code).
-      if (height == null) { // ignore: dead_code
+      if (height == null) {
         throw FlutterError.fromParts(<DiagnosticsNode>[
           ErrorSummary('The height argument to getMinIntrinsicWidth was null.'),
           ErrorDescription('The argument to getMinIntrinsicWidth must not be negative or null.'),
@@ -1550,10 +1547,7 @@ abstract class RenderBox extends RenderObject {
   @mustCallSuper
   double getMaxIntrinsicWidth(double height) {
     assert(() {
-      // `height` has a non-nullable return type, but might be null when
-      // running with weak checking, so we need to null check it anyway (and
-      // ignore the warning that the null-handling logic is dead code).
-      if (height == null) { // ignore: dead_code
+      if (height == null) {
         throw FlutterError.fromParts(<DiagnosticsNode>[
           ErrorSummary('The height argument to getMaxIntrinsicWidth was null.'),
           ErrorDescription('The argument to getMaxIntrinsicWidth must not be negative or null.'),
@@ -1636,10 +1630,7 @@ abstract class RenderBox extends RenderObject {
   @mustCallSuper
   double getMinIntrinsicHeight(double width) {
     assert(() {
-      // `width` has a non-nullable return type, but might be null when
-      // running with weak checking, so we need to null check it anyway (and
-      // ignore the warning that the null-handling logic is dead code).
-      if (width == null) { // ignore: dead_code
+      if (width == null) {
         throw FlutterError.fromParts(<DiagnosticsNode>[
           ErrorSummary('The width argument to getMinIntrinsicHeight was null.'),
           ErrorDescription('The argument to getMinIntrinsicHeight must not be negative or null.'),
@@ -1721,10 +1712,7 @@ abstract class RenderBox extends RenderObject {
   @mustCallSuper
   double getMaxIntrinsicHeight(double width) {
     assert(() {
-      // `width` has a non-nullable return type, but might be null when
-      // running with weak checking, so we need to null check it anyway (and
-      // ignore the warning that the null-handling logic is dead code).
-      if (width == null) { // ignore: dead_code
+      if (width == null) {
         throw FlutterError.fromParts(<DiagnosticsNode>[
           ErrorSummary('The width argument to getMaxIntrinsicHeight was null.'),
           ErrorDescription('The argument to getMaxIntrinsicHeight must not be negative or null.'),

packages/flutter/lib/src/rendering/custom_layout.dart

@@ -187,10 +187,7 @@ abstract class MultiChildLayoutDelegate {
           'There is no child with the id "$childId".'
         );
       }
-      // `offset` has a non-nullable return type, but might be null when
-      // running with weak checking, so we need to null check it anyway (and
-      // ignore the warning that the null-handling logic is dead code).
-      if (offset == null) { // ignore: dead_code
+      if (offset == null) {
         throw FlutterError(
           'The $this custom multichild layout delegate provided a null position for the child with id "$childId".'
         );

packages/flutter/lib/src/rendering/proxy_box.dart

@@ -1499,10 +1499,7 @@ class RenderClipRRect extends _RenderCustomClip<RRect> {
        assert(clipBehavior != Clip.none),
        _borderRadius = borderRadius,
        super(child: child, clipper: clipper, clipBehavior: clipBehavior) {
-    // `_borderRadius` has a non-nullable return type, but might be null when
-    // running with weak checking, so we need to null check it anyway (and
-    // ignore the warning that the null-handling logic is dead code).
-    assert(_borderRadius != null || clipper != null);// ignore: dead_code
+    assert(_borderRadius != null || clipper != null);
   }
 
   /// The border radius of the rounded corners.

packages/flutter/lib/src/rendering/viewport.dart

@@ -32,7 +32,6 @@ enum CacheExtentStyle {
 abstract class RenderAbstractViewport extends RenderObject {
   // This class is intended to be used as an interface, and should not be
   // extended directly; this constructor prevents instantiation and extension.
-  // ignore: unused_element
   factory RenderAbstractViewport._() => throw Error();
 
   /// Returns the [RenderAbstractViewport] that most tightly encloses the given

packages/flutter/lib/src/semantics/semantics_service.dart

@@ -20,7 +20,6 @@ import 'semantics_event.dart' show AnnounceSemanticsEvent, TooltipSemanticsEvent
 class SemanticsService {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   SemanticsService._();
 
   /// Sends a semantic announcement.

packages/flutter/lib/src/services/asset_bundle.dart

@@ -66,11 +66,8 @@ abstract class AssetBundle {
   /// implementation.)
   Future<String> loadString(String key, { bool cache = true }) async {
     final ByteData data = await load(key);
-    // Note: data has a non-nullable type, but might be null when running with
-    // weak checking, so we need to null check it anyway (and ignore the warning
-    // that the null-handling logic is dead code).
     if (data == null)
-      throw FlutterError('Unable to load asset: $key'); // ignore: dead_code
+      throw FlutterError('Unable to load asset: $key');
     // 50 KB of data should take 2-3 ms to parse on a Moto G4, and about 400 μs
     // on a Pixel 4.
     if (data.lengthInBytes < 50 * 1024) {

packages/flutter/lib/src/services/clipboard.dart

@@ -24,7 +24,6 @@ class ClipboardData {
 class Clipboard {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   Clipboard._();
 
   // Constants for common [getData] [format] types.

packages/flutter/lib/src/services/haptic_feedback.dart

@@ -12,7 +12,6 @@ import 'system_channels.dart';
 class HapticFeedback {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   HapticFeedback._();
 
   /// Provides vibration haptic feedback to the user for a short duration.

packages/flutter/lib/src/services/system_channels.dart

@@ -11,7 +11,6 @@ import 'platform_channel.dart';
 class SystemChannels {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   SystemChannels._();
 
   /// A JSON [MethodChannel] for navigation.

packages/flutter/lib/src/services/system_chrome.dart

@@ -219,7 +219,6 @@ List<String> _stringify(List<dynamic> list) => <String>[
 class SystemChrome {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   SystemChrome._();
 
   /// Specifies the set of orientations the application interface can

packages/flutter/lib/src/services/system_navigator.dart

@@ -9,7 +9,6 @@ import 'system_channels.dart';
 class SystemNavigator {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   SystemNavigator._();
 
   /// Removes the topmost Flutter instance, presenting what was before

packages/flutter/lib/src/services/system_sound.dart

@@ -29,7 +29,6 @@ enum SystemSoundType {
 class SystemSound {
   // This class is not meant to be instantiated or extended; this constructor
   // prevents instantiation and extension.
-  // ignore: unused_element
   SystemSound._();
 
   /// Play the specified system sound. If that sound is not present on the

packages/flutter/lib/src/widgets/framework.dart

@@ -1745,7 +1745,7 @@ abstract class MultiChildRenderObjectWidget extends RenderObjectWidget {
     assert(() {
       for (int index = 0; index < children.length; index++) {
         // TODO(a14n): remove this check to have a lot more const widget
-        if (children[index] == null) { // ignore: dead_code
+        if (children[index] == null) {
           throw FlutterError(
               "$runtimeType's children must not contain any null values, "
                   'but a null value was found at index $index'

packages/flutter/lib/src/widgets/navigator.dart

@@ -5355,13 +5355,13 @@ abstract class _RestorationInformation {
     final List<Object?> casted = data as List<Object?>;
     assert(casted.isNotEmpty);
     final _RouteRestorationType type = _RouteRestorationType.values[casted[0]! as int];
+    assert(type != null);
     switch (type) {
       case _RouteRestorationType.named:
         return _NamedRestorationInformation.fromSerializableData(casted.sublist(1));
       case _RouteRestorationType.anonymous:
         return _AnonymousRestorationInformation.fromSerializableData(casted.sublist(1));
     }
-    throw StateError('Invalid type: $type'); // ignore: dead_code
   }
 
   final _RouteRestorationType type;

packages/flutter/lib/src/widgets/scroll_view.dart

@@ -1278,7 +1278,7 @@ class ListView extends BoxScrollView {
            } else {
              widget = separatorBuilder(context, itemIndex);
              assert(() {
-               if (widget == null) { // ignore: dead_code
+               if (widget == null) {
                  throw FlutterError('separatorBuilder cannot return null.');
                }
                return true;

packages/flutter/test/material/elevated_button_test.dart

@@ -793,11 +793,13 @@ void main() {
     for (final double textScaleFactor in textScaleFactorOptions) {
       for (final TextDirection textDirection in textDirectionOptions) {
         for (final Widget? icon in iconOptions) {
-          final String testName = 'ElevatedButton'
-            ', text scale $textScaleFactor' // ignore: missing_whitespace_between_adjacent_strings, https://github.com/dart-lang/linter/issues/2489
-            '${icon != null ? ", with icon" : ""}'
-            '${textDirection == TextDirection.rtl ? ", RTL" : ""}';
-
+          final String testName = <String>[
+            'ElevatedButton, text scale $textScaleFactor',
+            if (icon != null)
+              'with icon',
+            if (textDirection == TextDirection.rtl)
+              'RTL',
+          ].join(', ');
           testWidgets(testName, (WidgetTester tester) async {
             await tester.pumpWidget(
               MaterialApp(

packages/flutter/test/material/outlined_button_test.dart

@@ -1038,11 +1038,13 @@ void main() {
     for (final double textScaleFactor in textScaleFactorOptions) {
       for (final TextDirection textDirection in textDirectionOptions) {
         for (final Widget? icon in iconOptions) {
-          final String testName = 'OutlinedButton'
-            ', text scale $textScaleFactor' // ignore: missing_whitespace_between_adjacent_strings, https://github.com/dart-lang/linter/issues/2489
-            '${icon != null ? ", with icon" : ""}'
-            '${textDirection == TextDirection.rtl ? ", RTL" : ""}';
-
+          final String testName = <String>[
+            'OutlinedButton, text scale $textScaleFactor',
+            if (icon != null)
+              'with icon',
+            if (textDirection == TextDirection.rtl)
+              'RTL',
+          ].join(', ');
           testWidgets(testName, (WidgetTester tester) async {
             await tester.pumpWidget(
               MaterialApp(

packages/flutter/test/material/text_button_test.dart

@@ -831,10 +831,13 @@ void main() {
     for (final double textScaleFactor in textScaleFactorOptions) {
       for (final TextDirection textDirection in textDirectionOptions) {
         for (final Widget? icon in iconOptions) {
-          final String testName = 'TextButton'
-            ', text scale $textScaleFactor' // ignore: missing_whitespace_between_adjacent_strings, https://github.com/dart-lang/linter/issues/2489
-            '${icon != null ? ", with icon" : ""}'
-            '${textDirection == TextDirection.rtl ? ", RTL" : ""}';
+          final String testName = <String>[
+            'TextButton, text scale $textScaleFactor',
+            if (icon != null)
+              'with icon',
+            if (textDirection == TextDirection.rtl)
+              'RTL',
+          ].join(', ');
 
           testWidgets(testName, (WidgetTester tester) async {
             await tester.pumpWidget(

packages/flutter/test/material/time_picker_test.dart

@@ -427,7 +427,7 @@ void _tests() {
     );
 
     // Ensure we preserve day period as we roll over.
-    final dynamic pickerState = tester.state(_timePickerDialog); // ignore: unnecessary_nullable_for_final_variable_declarations
+    final dynamic pickerState = tester.state(_timePickerDialog);
     expect(pickerState.selectedTime, const TimeOfDay(hour: 1, minute: 0));
 
     await actAndExpect(
@@ -492,7 +492,7 @@ void _tests() {
     );
 
     // Ensure we preserve hour period as we roll over.
-    final dynamic pickerState = tester.state(_timePickerDialog); // ignore: unnecessary_nullable_for_final_variable_declarations
+    final dynamic pickerState = tester.state(_timePickerDialog);
     expect(pickerState.selectedTime, const TimeOfDay(hour: 11, minute: 0));
 
     await actAndExpect(

packages/flutter/test/material/will_pop_test.dart

@@ -116,7 +116,7 @@ void main() {
 
     // Use didPopRoute() to simulate the system back button. Check that
     // didPopRoute() indicates that the notification was handled.
-    final dynamic widgetsAppState = tester.state(find.byType(WidgetsApp)); // ignore: unnecessary_nullable_for_final_variable_declarations
+    final dynamic widgetsAppState = tester.state(find.byType(WidgetsApp));
     expect(await widgetsAppState.didPopRoute(), isTrue);
     expect(find.text('Sample Page'), findsOneWidget);
 

packages/flutter/test/painting/mocks_for_image_cache.dart

@@ -8,7 +8,6 @@ import 'dart:ui' as ui show Image;
 import 'package:flutter/foundation.dart';
 import 'package:flutter/painting.dart';
 
-// ignore: must_be_immutable
 class TestImageInfo implements ImageInfo {
   const TestImageInfo(this.value, { required this.image, this.scale = 1.0, this.debugLabel });
 

packages/flutter/test/painting/system_fonts_test.dart

@@ -74,7 +74,7 @@ void main() {
         ),
       ),
     );
-    final dynamic state = tester.state(find.byType(CupertinoDatePicker)); // ignore: unnecessary_nullable_for_final_variable_declarations
+    final dynamic state = tester.state(find.byType(CupertinoDatePicker));
     final Map<int, double> cache = state.estimatedColumnWidths as Map<int, double>;
     expect(cache.isNotEmpty, isTrue);
     const Map<String, dynamic> data = <String, dynamic>{
@@ -100,7 +100,7 @@ void main() {
         ),
       ),
     );
-    final dynamic state = tester.state(find.byType(CupertinoDatePicker)); // ignore: unnecessary_nullable_for_final_variable_declarations
+    final dynamic state = tester.state(find.byType(CupertinoDatePicker));
     final Map<int, double> cache = state.estimatedColumnWidths as Map<int, double>;
     // Simulates font missing.
     cache.clear();
@@ -126,7 +126,7 @@ void main() {
         ),
       ),
     );
-    final dynamic state = tester.state(find.byType(CupertinoTimerPicker)); // ignore: unnecessary_nullable_for_final_variable_declarations
+    final dynamic state = tester.state(find.byType(CupertinoTimerPicker));
     // Simulates wrong metrics due to font missing.
     state.numberLabelWidth = 0.0;
     state.numberLabelHeight = 0.0;

packages/flutter/test/services/text_input_test.dart

@@ -133,7 +133,7 @@ void main() {
     test('basic structure', () async {
       const TextInputType text = TextInputType.text;
       const TextInputType number = TextInputType.number;
-      const TextInputType number2 = TextInputType.numberWithOptions(); // ignore: use_named_constants
+      const TextInputType number2 = TextInputType.numberWithOptions();
       const TextInputType signed = TextInputType.numberWithOptions(signed: true);
       const TextInputType signed2 = TextInputType.numberWithOptions(signed: true);
       const TextInputType decimal = TextInputType.numberWithOptions(decimal: true);

packages/flutter/test/widgets/gesture_detector_test.dart

@@ -908,7 +908,7 @@ class ButtonVariant extends TestVariant<int> {
   const ButtonVariant({
     required this.values,
     required this.descriptions,
-  }) : assert(values.length != 0); // ignore: prefer_is_empty
+  }) : assert(values.length != 0);
 
   @override
   final List<int> values;

packages/flutter/test/widgets/localizations_test.dart

@@ -20,7 +20,7 @@ void main() {
       ],
       child: const Text('loaded')
     ));
-    final dynamic state = tester.state(find.byType(Localizations)); // ignore: unnecessary_nullable_for_final_variable_declarations
+    final dynamic state = tester.state(find.byType(Localizations));
     expect(state!.locale, isNull);
     expect(find.text('loaded'), findsNothing);
 

packages/flutter/test/widgets/overlay_test.dart

@@ -1035,7 +1035,6 @@ void main() {
     );
 
     // By default, clipBehavior should be Clip.hardEdge
-    // ignore: unnecessary_nullable_for_final_variable_declarations
     final dynamic renderObject = tester.renderObject(find.byType(Overlay));
     expect(renderObject.clipBehavior, equals(Clip.hardEdge));
 

packages/flutter/test/widgets/single_child_scroll_view_test.dart

@@ -50,7 +50,7 @@ void main() {
     );
 
     // 1st, check that the render object has received the default clip behavior.
-    final dynamic renderObject = tester.allRenderObjects.where((RenderObject o) => o.runtimeType.toString() == '_RenderSingleChildViewport').first; // ignore: unnecessary_nullable_for_final_variable_declarations
+    final dynamic renderObject = tester.allRenderObjects.where((RenderObject o) => o.runtimeType.toString() == '_RenderSingleChildViewport').first;
     expect(renderObject.clipBehavior, equals(Clip.hardEdge));
 
     // 2nd, height == widow.height test: check that the painting context does not call pushClipRect .
@@ -104,7 +104,7 @@ void main() {
     await tester.pumpWidget(SingleChildScrollView(child: Container(height: 2000.0)));
 
     // 1st, check that the render object has received the default clip behavior.
-    final dynamic renderObject = tester.allRenderObjects.where((RenderObject o) => o.runtimeType.toString() == '_RenderSingleChildViewport').first; // ignore: unnecessary_nullable_for_final_variable_declarations
+    final dynamic renderObject = tester.allRenderObjects.where((RenderObject o) => o.runtimeType.toString() == '_RenderSingleChildViewport').first;
     expect(renderObject.clipBehavior, equals(Clip.hardEdge));
 
     // 2nd, check that the painting context has received the default clip behavior.