Remove "unnecessary" imports. (#74821)

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

@@ -6,8 +6,6 @@ import 'dart:ui' as ui;
 
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
-import 'package:flutter/rendering.dart';
-import 'package:flutter/widgets.dart';
 
 import 'arc.dart';
 import 'colors.dart';

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

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

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

@@ -5,7 +5,6 @@
 import 'dart:ui' show lerpDouble;
 
 import 'package:flutter/foundation.dart';
-import 'package:flutter/scheduler.dart';
 import 'package:flutter/widgets.dart';
 
 import 'bottom_sheet_theme.dart';

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

@@ -5,7 +5,6 @@
 import 'dart:math' as math;
 
 import 'package:flutter/foundation.dart';
-import 'package:flutter/gestures.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 

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

@@ -5,7 +5,6 @@
 import 'dart:math' as math;
 
 import 'package:flutter/foundation.dart';
-import 'package:flutter/gestures.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 

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

@@ -4,7 +4,6 @@
 
 import 'dart:math' as math;
 
-import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/services.dart';

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

@@ -4,8 +4,6 @@
 
 import 'dart:math' as math;
 
-import 'package:flutter/foundation.dart';
-import 'package:flutter/gestures.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 

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

@@ -4,8 +4,6 @@
 
 import 'dart:math' as math;
 
-import 'package:flutter/gestures.dart';
-import 'package:flutter/painting.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 

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

@@ -10,7 +10,6 @@ import 'package:flutter/widgets.dart';
 
 import 'colors.dart';
 import 'theme.dart';
-import 'theme_data.dart';
 
 /// Applies a chip theme to descendant [RawChip]-based widgets, like [Chip],
 /// [InputChip], [ChoiceChip], [FilterChip], and [ActionChip].

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

@@ -6,7 +6,6 @@ import 'package:flutter/widgets.dart';
 
 import 'constants.dart';
 import 'theme.dart';
-import 'theme_data.dart';
 
 // Examples can assume:
 // late String userAvatarUrl;

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

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter/foundation.dart';
-import 'package:flutter/services.dart' show Brightness;
 import 'package:flutter/widgets.dart';
 
 import 'colors.dart';

packages/flutter/lib/src/material/colors.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' show Color;
-
 import 'package:flutter/painting.dart';
 
 /// Defines a single color as well a color swatch with ten shades of the color.

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

@@ -19,7 +19,6 @@ import 'ink_well.dart';
 import 'material.dart';
 import 'material_state.dart';
 import 'theme.dart';
-import 'theme_data.dart';
 import 'tooltip.dart';
 
 /// Signature for [DataColumn.onSort] callback.

packages/flutter/lib/src/material/debug.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/foundation.dart';
 import 'package:flutter/widgets.dart';
 
 import 'material.dart';

packages/flutter/lib/src/material/desktop_text_selection.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/gestures.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';

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

@@ -4,7 +4,6 @@
 
 import 'dart:ui';
 
-import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 
 import 'button_bar.dart';

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

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter/widgets.dart';
-import 'package:flutter/painting.dart';
 
 import 'divider_theme.dart';
 import 'theme.dart';

packages/flutter/lib/src/material/drawer.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/foundation.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter/gestures.dart' show DragStartBehavior;
 

packages/flutter/lib/src/material/expansion_panel.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/rendering.dart';
 import 'package:flutter/widgets.dart';
 
 import 'constants.dart';

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

@@ -8,7 +8,6 @@ import 'colors.dart';
 import 'icons.dart';
 import 'list_tile.dart';
 import 'theme.dart';
-import 'theme_data.dart';
 
 const Duration _kExpand = Duration(milliseconds: 200);