Remove "unnecessary" imports. (#75950)

packages/flutter/test/widgets/page_forward_transitions_test.dart

@@ -4,7 +4,6 @@
 
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/rendering.dart';
 
 class TestTransition extends AnimatedWidget {
   const TestTransition({

packages/flutter/test/widgets/page_route_builder_test.dart

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 class TestPage extends StatelessWidget {

packages/flutter/test/widgets/page_view_test.dart

@@ -5,7 +5,6 @@
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter/gestures.dart' show DragStartBehavior;
 
 import '../rendering/rendering_tester.dart';

packages/flutter/test/widgets/pageable_list_test.dart

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter_test/flutter_test.dart';
-import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 
 Size pageSize = const Size(600.0, 300.0);

packages/flutter/test/widgets/physical_model_test.dart

@@ -6,7 +6,6 @@ import 'dart:math' as math show pi;
 
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 void main() {

packages/flutter/test/widgets/render_object_element_test.dart

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter_test/flutter_test.dart';
-import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 

packages/flutter/test/widgets/reorderable_list_test.dart

@@ -5,7 +5,6 @@
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 
 void main() {
   testWidgets('negative itemCount should assert', (WidgetTester tester) async {

packages/flutter/test/widgets/restorable_property_test.dart

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter/widgets.dart';
-import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 void main() {

packages/flutter/test/widgets/restoration.dart

@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
 
 export '../services/restoration.dart';

packages/flutter/test/widgets/restoration_mixin_test.dart

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter/widgets.dart';
-import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 import 'restoration.dart';

packages/flutter/test/widgets/restoration_scope_test.dart

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter/widgets.dart';
-import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 import 'restoration.dart';

packages/flutter/test/widgets/root_restoration_scope_test.dart

@@ -5,7 +5,6 @@
 import 'dart:async';
 
 import 'package:flutter/foundation.dart';
-import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/widgets/route_notification_messages_test.dart

@@ -3,8 +3,6 @@
 // found in the LICENSE file.
 
 @TestOn('!chrome')
-import 'dart:ui';
-
 import 'package:flutter/foundation.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';

packages/flutter/test/widgets/routes_test.dart

@@ -4,13 +4,10 @@
 
 import 'dart:collection';
 
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 
-import '../flutter_test_alternative.dart' show Fake;
 import 'semantics_tester.dart';
 
 final List<String> results = <String>[];

packages/flutter/test/widgets/safe_area_test.dart

@@ -4,7 +4,6 @@
 
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter/material.dart';
 
 void main() {

packages/flutter/test/widgets/scroll_notification_test.dart

@@ -5,7 +5,6 @@
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 
 void main() {
   testWidgets('Scroll notification basics', (WidgetTester tester) async {

packages/flutter/test/widgets/scroll_physics_test.dart

@@ -2,10 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 class TestScrollPhysics extends ScrollPhysics {

packages/flutter/test/widgets/scroll_position_test.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:ui';
-
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 

packages/flutter/test/widgets/scroll_view_test.dart

@@ -4,7 +4,6 @@
 
 import 'package:flutter/services.dart' show LogicalKeyboardKey;
 import 'package:flutter_test/flutter_test.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter/gestures.dart' show DragStartBehavior;
 import 'package:flutter/material.dart';
 

packages/flutter/test/widgets/scrollable_dispose_test.dart

@@ -2,10 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:flutter/widgets.dart';
 
 import 'test_widgets.dart';
 

packages/flutter/test/widgets/scrollable_grid_test.dart

@@ -4,7 +4,6 @@
 
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
-import 'package:flutter/rendering.dart';
 
 void main() {
   testWidgets('GridView default control', (WidgetTester tester) async {

packages/flutter/test/widgets/scrollable_in_overlay_test.dart

@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 

packages/flutter/test/widgets/scrollable_list_hit_testing_test.dart

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter_test/flutter_test.dart';
-import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter/gestures.dart' show DragStartBehavior;
 

packages/flutter/test/widgets/scrollable_restoration_test.dart

@@ -5,7 +5,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:flutter/widgets.dart';
 
 void main() {
   testWidgets('CustomScrollView restoration', (WidgetTester tester) async {

packages/flutter/test/widgets/scrollable_semantics_test.dart

@@ -7,7 +7,6 @@ import 'dart:ui';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter/gestures.dart' show DragStartBehavior;
 
 import 'semantics_tester.dart';

packages/flutter/test/widgets/scrollable_semantics_traversal_order_test.dart

@@ -5,7 +5,6 @@
 import 'dart:ui';
 
 import 'package:flutter/rendering.dart';
-import 'package:flutter/semantics.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 

packages/flutter/test/widgets/scrollbar_test.dart

@@ -8,7 +8,6 @@ import 'package:flutter/src/physics/utils.dart' show nearEqual;
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 
-import '../flutter_test_alternative.dart' show Fake;
 import '../rendering/mock_canvas.dart';
 
 const Color _kScrollbarColor = Color(0xFF123456);