Remove references to deprecated `ThemeData.primaryColorBrightness` (#127238)

## Description

Removes references to `ThemeData.primaryColorBrightness`, deprecated in https://github.com/flutter/flutter/pull/93396 and subject to remove now because of our [deprecation policy](https://github.com/flutter/flutter/wiki/Tree-hygiene#deprecations).

## Related PRs
 - https://github.com/flutter/flutter/pull/93396

## Tests
 - Removed unneeded tests, removed references.

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

@@ -307,8 +307,8 @@ class ThemeData with Diagnosticable {
     VisualDensity? visualDensity,
     // COLOR
     // [colorScheme] is the preferred way to configure colors. The other color
-    // properties (as well as primaryColorBrightness, and primarySwatch)
-    // will gradually be phased out, see https://github.com/flutter/flutter/issues/91772.
+    // properties (as well as primarySwatch) will gradually be phased out, see
+    // https://github.com/flutter/flutter/issues/91772.
     Brightness? brightness,
     Color? canvasColor,
     Color? cardColor,
@@ -388,11 +388,6 @@ class ThemeData with Diagnosticable {
     ToggleButtonsThemeData? toggleButtonsTheme,
     TooltipThemeData? tooltipTheme,
     // DEPRECATED (newest deprecations at the bottom)
-    @Deprecated(
-      'No longer used by the framework, please remove any reference to it. '
-      'This feature was deprecated after v2.6.0-11.0.pre.',
-    )
-    Brightness? primaryColorBrightness,
     @Deprecated(
       'Use ThemeData.useMaterial3 or override ScrollBehavior.buildOverscrollIndicator. '
       'This feature was deprecated after v2.13.0-0.0.pre.'
@@ -469,7 +464,6 @@ class ThemeData with Diagnosticable {
 
       // Default some of the color settings to values from the color scheme
       primaryColor ??= primarySurfaceColor;
-      primaryColorBrightness = ThemeData.estimateBrightnessForColor(primarySurfaceColor);
       canvasColor ??= colorScheme.background;
       scaffoldBackgroundColor ??= colorScheme.background;
       bottomAppBarColor ??= colorScheme.surface;
@@ -599,7 +593,6 @@ class ThemeData with Diagnosticable {
     tooltipTheme ??= const TooltipThemeData();
 
     // DEPRECATED (newest deprecations at the bottom)
-    primaryColorBrightness = estimatedPrimaryColorBrightness;
     errorColor ??= Colors.red[700]!;
     backgroundColor ??= isDark ? Colors.grey[700]! : primarySwatch[200]!;
     bottomAppBarColor ??= colorSchemeSeed != null ? colorScheme.surface : isDark ? Colors.grey[800]! : Colors.white;
@@ -696,7 +689,6 @@ class ThemeData with Diagnosticable {
       toggleButtonsTheme: toggleButtonsTheme,
       tooltipTheme: tooltipTheme,
       // DEPRECATED (newest deprecations at the bottom)
-      primaryColorBrightness: primaryColorBrightness,
       androidOverscrollIndicator: androidOverscrollIndicator,
       toggleableActiveColor: toggleableActiveColor,
       selectedRowColor: selectedRowColor,
@@ -808,11 +800,6 @@ class ThemeData with Diagnosticable {
     required this.toggleButtonsTheme,
     required this.tooltipTheme,
     // DEPRECATED (newest deprecations at the bottom)
-    @Deprecated(
-      'No longer used by the framework, please remove any reference to it. '
-      'This feature was deprecated after v2.6.0-11.0.pre.',
-    )
-    Brightness? primaryColorBrightness,
     @Deprecated(
       'Use ThemeData.useMaterial3 or override ScrollBehavior.buildOverscrollIndicator. '
       'This feature was deprecated after v2.13.0-0.0.pre.'
@@ -848,7 +835,6 @@ class ThemeData with Diagnosticable {
 
   }) : // DEPRECATED (newest deprecations at the bottom)
        // should not be `required`, use getter pattern to avoid breakages.
-       _primaryColorBrightness = primaryColorBrightness,
        _toggleableActiveColor = toggleableActiveColor,
        _selectedRowColor = selectedRowColor,
        _errorColor = errorColor,
@@ -856,7 +842,6 @@ class ThemeData with Diagnosticable {
        _bottomAppBarColor = bottomAppBarColor,
        assert(toggleableActiveColor != null),
         // DEPRECATED (newest deprecations at the bottom)
-       assert(primaryColorBrightness != null),
        assert(errorColor != null),
        assert(backgroundColor != null);
 
@@ -903,7 +888,6 @@ class ThemeData with Diagnosticable {
       colorScheme: colorScheme,
       brightness: colorScheme.brightness,
       primaryColor: primarySurfaceColor,
-      primaryColorBrightness: ThemeData.estimateBrightnessForColor(primarySurfaceColor),
       canvasColor: colorScheme.background,
       scaffoldBackgroundColor: colorScheme.background,
       bottomAppBarColor: colorScheme.surface,
@@ -1524,22 +1508,6 @@ class ThemeData with Diagnosticable {
 
   // DEPRECATED (newest deprecations at the bottom)
 
-  /// Obsolete property that was originally used to determine the color
-  /// of text and icons placed on top of the primary color (e.g. toolbar text).
-  ///
-  /// The material library no longer uses this property. The [appBarTheme] can
-  /// be used to configure the appearance of [AppBar]s. The appearance of
-  /// Keyboards for [TextField]s now uses the overall theme's
-  /// [ThemeData.brightness] and can also be customized with
-  /// [TextField.keyboardAppearance]. The brightness of any color can be found
-  /// with [ThemeData.estimateBrightnessForColor].
-  @Deprecated(
-    'No longer used by the framework, please remove any reference to it. '
-    'This feature was deprecated after v2.6.0-11.0.pre.',
-  )
-  Brightness get primaryColorBrightness => _primaryColorBrightness!;
-  final Brightness? _primaryColorBrightness;
-
   /// Specifies which overscroll indicator to use on [TargetPlatform.android].
   ///
   /// When null, the default value of
@@ -1696,11 +1664,6 @@ class ThemeData with Diagnosticable {
     ToggleButtonsThemeData? toggleButtonsTheme,
     TooltipThemeData? tooltipTheme,
     // DEPRECATED (newest deprecations at the bottom)
-    @Deprecated(
-      'No longer used by the framework, please remove any reference to it. '
-      'This feature was deprecated after v2.6.0-11.0.pre.',
-    )
-    Brightness? primaryColorBrightness,
     @Deprecated(
       'Use ThemeData.useMaterial3 or override ScrollBehavior.buildOverscrollIndicator. '
       'This feature was deprecated after v2.13.0-0.0.pre.'
@@ -1827,7 +1790,6 @@ class ThemeData with Diagnosticable {
       toggleButtonsTheme: toggleButtonsTheme ?? this.toggleButtonsTheme,
       tooltipTheme: tooltipTheme ?? this.tooltipTheme,
       // DEPRECATED (newest deprecations at the bottom)
-      primaryColorBrightness: primaryColorBrightness ?? _primaryColorBrightness,
       androidOverscrollIndicator: androidOverscrollIndicator ?? this.androidOverscrollIndicator,
       toggleableActiveColor: toggleableActiveColor ?? _toggleableActiveColor,
       selectedRowColor: selectedRowColor ?? _selectedRowColor,
@@ -2022,7 +1984,6 @@ class ThemeData with Diagnosticable {
       toggleButtonsTheme: ToggleButtonsThemeData.lerp(a.toggleButtonsTheme, b.toggleButtonsTheme, t)!,
       tooltipTheme: TooltipThemeData.lerp(a.tooltipTheme, b.tooltipTheme, t)!,
       // DEPRECATED (newest deprecations at the bottom)
-      primaryColorBrightness: t < 0.5 ? a.primaryColorBrightness : b.primaryColorBrightness,
       androidOverscrollIndicator:t < 0.5 ? a.androidOverscrollIndicator : b.androidOverscrollIndicator,
       toggleableActiveColor: Color.lerp(a.toggleableActiveColor, b.toggleableActiveColor, t),
       selectedRowColor: Color.lerp(a.selectedRowColor, b.selectedRowColor, t),
@@ -2129,7 +2090,6 @@ class ThemeData with Diagnosticable {
         other.toggleButtonsTheme == toggleButtonsTheme &&
         other.tooltipTheme == tooltipTheme &&
         // DEPRECATED (newest deprecations at the bottom)
-        other.primaryColorBrightness == primaryColorBrightness &&
         other.androidOverscrollIndicator == androidOverscrollIndicator &&
         other.toggleableActiveColor == toggleableActiveColor &&
         other.selectedRowColor == selectedRowColor &&
@@ -2233,7 +2193,6 @@ class ThemeData with Diagnosticable {
       toggleButtonsTheme,
       tooltipTheme,
       // DEPRECATED (newest deprecations at the bottom)
-      primaryColorBrightness,
       androidOverscrollIndicator,
       toggleableActiveColor,
       selectedRowColor,
@@ -2339,7 +2298,6 @@ class ThemeData with Diagnosticable {
     properties.add(DiagnosticsProperty<ToggleButtonsThemeData>('toggleButtonsTheme', toggleButtonsTheme, level: DiagnosticLevel.debug));
     properties.add(DiagnosticsProperty<TooltipThemeData>('tooltipTheme', tooltipTheme, level: DiagnosticLevel.debug));
     // DEPRECATED (newest deprecations at the bottom)
-    properties.add(EnumProperty<Brightness>('primaryColorBrightness', primaryColorBrightness, defaultValue: defaultData.primaryColorBrightness, level: DiagnosticLevel.debug));
     properties.add(EnumProperty<AndroidOverscrollIndicator>('androidOverscrollIndicator', androidOverscrollIndicator, defaultValue: null, level: DiagnosticLevel.debug));
     properties.add(ColorProperty('toggleableActiveColor', toggleableActiveColor, defaultValue: defaultData.toggleableActiveColor, level: DiagnosticLevel.debug));
     properties.add(ColorProperty('selectedRowColor', selectedRowColor, defaultValue: defaultData.selectedRowColor, level: DiagnosticLevel.debug));

packages/flutter/test/material/app_bar_test.dart

@@ -2455,7 +2455,6 @@ void main() {
       ),
     ));
 
-    expect(darkTheme.primaryColorBrightness, Brightness.dark);
     expect(darkTheme.colorScheme.brightness, Brightness.dark);
     expect(SystemChrome.latestStyle, const SystemUiOverlayStyle(
       statusBarBrightness: Brightness.dark,
@@ -2476,7 +2475,6 @@ void main() {
       ),
     );
 
-    expect(lightTheme.primaryColorBrightness, Brightness.light);
     expect(lightTheme.colorScheme.brightness, Brightness.light);
     expect(SystemChrome.latestStyle, const SystemUiOverlayStyle(
       statusBarBrightness: Brightness.light,

packages/flutter/test/material/circle_avatar_test.dart

@@ -286,10 +286,7 @@ void main() {
     // is turned on by default, these tests can be removed.
 
     testWidgets('CircleAvatar default colors with light theme', (WidgetTester tester) async {
-      final ThemeData theme = ThemeData(
-        primaryColor: Colors.grey.shade100,
-        primaryColorBrightness: Brightness.light,
-      );
+      final ThemeData theme = ThemeData(primaryColor: Colors.grey.shade100);
       await tester.pumpWidget(
         wrap(
           child: Theme(
@@ -311,10 +308,7 @@ void main() {
     });
 
     testWidgets('CircleAvatar default colors with dark theme', (WidgetTester tester) async {
-      final ThemeData theme = ThemeData(
-        primaryColor: Colors.grey.shade800,
-        primaryColorBrightness: Brightness.dark,
-      );
+      final ThemeData theme = ThemeData(primaryColor: Colors.grey.shade800);
       await tester.pumpWidget(
         wrap(
           child: Theme(

packages/flutter/test/material/snack_bar_test.dart

@@ -445,7 +445,6 @@ void main() {
     final ThemeData theme = ThemeData.light().copyWith(
       visualDensity: VisualDensity.standard,
       primaryColor: Colors.black,
-      primaryColorBrightness: Brightness.dark,
       primaryColorLight: Colors.black,
       primaryColorDark: Colors.black,
       canvasColor: Colors.black,

packages/flutter/test/material/theme_data_test.dart

@@ -125,19 +125,6 @@ void main() {
     expect(ThemeData.estimateBrightnessForColor(Colors.indigo), equals(Brightness.dark));
   });
 
-  test('Can estimate brightness - indirectly', () {
-    expect(ThemeData(primaryColor: Colors.white).primaryColorBrightness, equals(Brightness.light));
-    expect(ThemeData(primaryColor: Colors.black).primaryColorBrightness, equals(Brightness.dark));
-    expect(ThemeData(primaryColor: Colors.blue).primaryColorBrightness, equals(Brightness.dark));
-    expect(ThemeData(primaryColor: Colors.yellow).primaryColorBrightness, equals(Brightness.light));
-    expect(ThemeData(primaryColor: Colors.deepOrange).primaryColorBrightness, equals(Brightness.dark));
-    expect(ThemeData(primaryColor: Colors.orange).primaryColorBrightness, equals(Brightness.light));
-    expect(ThemeData(primaryColor: Colors.lime).primaryColorBrightness, equals(Brightness.light));
-    expect(ThemeData(primaryColor: Colors.grey).primaryColorBrightness, equals(Brightness.light));
-    expect(ThemeData(primaryColor: Colors.teal).primaryColorBrightness, equals(Brightness.dark));
-    expect(ThemeData(primaryColor: Colors.indigo).primaryColorBrightness, equals(Brightness.dark));
-  });
-
   test('cursorColor', () {
     expect(const TextSelectionThemeData(cursorColor: Colors.red).cursorColor, Colors.red);
   });
@@ -182,7 +169,6 @@ void main() {
     expect(theme.colorScheme.brightness, Brightness.light);
 
     expect(theme.primaryColor, theme.colorScheme.primary);
-    expect(theme.primaryColorBrightness, Brightness.dark);
     expect(theme.canvasColor, theme.colorScheme.background);
     expect(theme.scaffoldBackgroundColor, theme.colorScheme.background);
     expect(theme.bottomAppBarColor, theme.colorScheme.surface);
@@ -232,7 +218,6 @@ void main() {
     expect(theme.colorScheme.brightness, Brightness.dark);
 
     expect(theme.primaryColor, theme.colorScheme.surface);
-    expect(theme.primaryColorBrightness, Brightness.dark);
     expect(theme.canvasColor, theme.colorScheme.background);
     expect(theme.scaffoldBackgroundColor, theme.colorScheme.background);
     expect(theme.bottomAppBarColor, theme.colorScheme.surface);
@@ -279,7 +264,6 @@ void main() {
     expect(theme.colorScheme.brightness, Brightness.light);
 
     expect(theme.primaryColor, theme.colorScheme.primary);
-    expect(theme.primaryColorBrightness, Brightness.dark);
     expect(theme.canvasColor, theme.colorScheme.background);
     expect(theme.scaffoldBackgroundColor, theme.colorScheme.background);
     expect(theme.bottomAppBarColor, theme.colorScheme.surface);
@@ -327,7 +311,6 @@ void main() {
     expect(theme.colorScheme.brightness, Brightness.light);
 
     expect(theme.primaryColor, theme.colorScheme.primary);
-    expect(theme.primaryColorBrightness, Brightness.dark);
     expect(theme.canvasColor, theme.colorScheme.background);
     expect(theme.scaffoldBackgroundColor, theme.colorScheme.background);
     expect(theme.bottomAppBarColor, theme.colorScheme.surface);
@@ -375,7 +358,6 @@ void main() {
     expect(theme.colorScheme.brightness, Brightness.dark);
 
     expect(theme.primaryColor, theme.colorScheme.surface);
-    expect(theme.primaryColorBrightness, Brightness.dark);
     expect(theme.canvasColor, theme.colorScheme.background);
     expect(theme.scaffoldBackgroundColor, theme.colorScheme.background);
     expect(theme.bottomAppBarColor, theme.colorScheme.surface);
@@ -826,7 +808,6 @@ void main() {
       toggleButtonsTheme: const ToggleButtonsThemeData(textStyle: TextStyle(color: Colors.black)),
       tooltipTheme: const TooltipThemeData(height: 100),
       // DEPRECATED (newest deprecations at the bottom)
-      primaryColorBrightness: Brightness.dark,
       androidOverscrollIndicator: AndroidOverscrollIndicator.glow,
       toggleableActiveColor: Colors.black,
       selectedRowColor: Colors.black,
@@ -946,7 +927,6 @@ void main() {
       tooltipTheme: const TooltipThemeData(height: 100),
 
       // DEPRECATED (newest deprecations at the bottom)
-      primaryColorBrightness: Brightness.light,
       androidOverscrollIndicator: AndroidOverscrollIndicator.stretch,
       toggleableActiveColor: Colors.white,
       selectedRowColor: Colors.white,
@@ -1049,7 +1029,6 @@ void main() {
       tooltipTheme: otherTheme.tooltipTheme,
 
       // DEPRECATED (newest deprecations at the bottom)
-      primaryColorBrightness: otherTheme.primaryColorBrightness,
       androidOverscrollIndicator: otherTheme.androidOverscrollIndicator,
       toggleableActiveColor: otherTheme.toggleableActiveColor,
       selectedRowColor: otherTheme.selectedRowColor,
@@ -1153,7 +1132,6 @@ void main() {
     expect(themeDataCopy.tooltipTheme, equals(otherTheme.tooltipTheme));
 
     // DEPRECATED (newest deprecations at the bottom)
-    expect(themeDataCopy.primaryColorBrightness, equals(otherTheme.primaryColorBrightness));
     expect(themeDataCopy.androidOverscrollIndicator, equals(otherTheme.androidOverscrollIndicator));
     expect(themeDataCopy.toggleableActiveColor, equals(otherTheme.toggleableActiveColor));
     expect(themeDataCopy.selectedRowColor, equals(otherTheme.selectedRowColor));
@@ -1288,7 +1266,6 @@ void main() {
       'toggleButtonsTheme',
       'tooltipTheme',
       // DEPRECATED (newest deprecations at the bottom)
-      'primaryColorBrightness',
       'androidOverscrollIndicator',
       'toggleableActiveColor',
       'selectedRowColor',