Remove "unnecessary" imports. (#73344)

packages/flutter/lib/src/widgets/animated_list.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/animation.dart';
 import 'package:flutter/foundation.dart';
 
 import 'basic.dart';

packages/flutter/lib/src/widgets/animated_switcher.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/animation.dart';
 import 'package:flutter/foundation.dart';
 
 import 'basic.dart';

packages/flutter/lib/src/widgets/annotated_region.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/rendering.dart';
 
 import 'framework.dart';

packages/flutter/lib/src/widgets/autocomplete.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/scheduler.dart';
 
 import 'basic.dart';

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

@@ -5,7 +5,6 @@
 import 'dart:math' as math;
 
 import 'package:flutter/foundation.dart';
-import 'package:flutter/painting.dart';
 
 import 'basic.dart';
 import 'debug.dart';

packages/flutter/lib/src/widgets/color_filter.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/foundation.dart';
 import 'package:flutter/rendering.dart';
 

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

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

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

@@ -8,7 +8,6 @@ import 'dart:ui' as ui hide TextStyle;
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart' show DragStartBehavior;
-import 'package:flutter/painting.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/scheduler.dart';
 import 'package:flutter/services.dart';

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

@@ -2,10 +2,7 @@
 // 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/foundation.dart';
-import 'package:flutter/painting.dart';
 
 import 'actions.dart';
 import 'basic.dart';

packages/flutter/lib/src/widgets/grid_paper.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 'package:flutter/rendering.dart';
-
 import 'basic.dart';
 import 'framework.dart';
 

packages/flutter/lib/src/widgets/icon_theme_data.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 'dart:ui' show Color, hashValues;
 import 'dart:ui' as ui show lerpDouble;
 
 import 'package:flutter/foundation.dart';

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

@@ -7,7 +7,6 @@ import 'dart:io' show File;
 import 'dart:typed_data';
 
 import 'package:flutter/foundation.dart';
-import 'package:flutter/painting.dart';
 import 'package:flutter/scheduler.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter/semantics.dart';

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

@@ -4,9 +4,7 @@
 
 import 'dart:ui' as ui show TextHeightBehavior;
 
-import 'package:flutter/animation.dart';
 import 'package:flutter/foundation.dart';
-import 'package:flutter/painting.dart';
 import 'package:flutter/rendering.dart';
 import 'package:vector_math/vector_math_64.dart';
 

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

@@ -4,8 +4,6 @@
 
 import 'dart:collection';
 
-import 'package:flutter/foundation.dart';
-
 import 'framework.dart';
 
 /// An [InheritedWidget] that's intended to be used as the base class for

packages/flutter/lib/src/widgets/inherited_theme.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 'package:flutter/foundation.dart';
-
 import 'framework.dart';
 
 /// An [InheritedWidget] that defines visual properties like colors

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

@@ -5,7 +5,6 @@
 import 'dart:collection';
 import 'dart:math' as math;
 
-import 'package:flutter/animation.dart';
 import 'package:flutter/physics.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/scheduler.dart';

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

@@ -2,13 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:ui' show Locale;
-
 import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart';
 
 import 'basic.dart';
-import 'binding.dart';
 import 'container.dart';
 import 'debug.dart';
 import 'framework.dart';

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

@@ -4,8 +4,6 @@
 
 import 'dart:math' as math;
 
-import 'package:flutter/rendering.dart';
-
 import 'basic.dart';
 import 'debug.dart';
 import 'framework.dart';

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

@@ -6,11 +6,8 @@ import 'dart:math' as math;
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
-import 'package:flutter/painting.dart';
-import 'package:flutter/physics.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/scheduler.dart';
-import 'package:flutter/gestures.dart' show DragStartBehavior;
 
 import 'basic.dart';
 import 'framework.dart';
@@ -23,7 +20,6 @@ import 'scroll_physics.dart';
 import 'scroll_position.dart';
 import 'scroll_view.dart';
 import 'sliver_fill.dart';
-import 'ticker_provider.dart';
 import 'viewport.dart';
 
 // Examples can assume:

packages/flutter/lib/src/widgets/overflow_bar.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 'basic.dart';

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

@@ -5,7 +5,6 @@
 import 'dart:async' show Timer;
 import 'dart:math' as math;
 
-import 'package:flutter/animation.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/physics.dart';
 import 'package:flutter/rendering.dart';

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

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

packages/flutter/lib/src/widgets/placeholder.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 'package:flutter/rendering.dart';
-
 import 'basic.dart';
 import 'framework.dart';
 

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

@@ -5,7 +5,6 @@
 import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
 
-import 'basic.dart';
 import 'focus_manager.dart';
 import 'focus_scope.dart';
 import 'framework.dart';

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

@@ -13,10 +13,8 @@ import 'package:flutter/scheduler.dart';
 
 import 'basic.dart';
 import 'framework.dart';
-import 'gesture_detector.dart';
 import 'scroll_metrics.dart';
 import 'scroll_notification.dart';
-import 'ticker_provider.dart';
 
 /// A backend for a [ScrollActivity].
 ///

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

@@ -10,7 +10,6 @@ import 'package:flutter/scheduler.dart';
 
 import 'basic.dart';
 import 'framework.dart';
-import 'gesture_detector.dart';
 import 'page_storage.dart';
 import 'scroll_activity.dart';
 import 'scroll_context.dart';

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

@@ -10,7 +10,6 @@ import 'package:flutter/rendering.dart';
 
 import 'basic.dart';
 import 'framework.dart';
-import 'gesture_detector.dart';
 import 'scroll_activity.dart';
 import 'scroll_context.dart';
 import 'scroll_notification.dart';

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

@@ -8,8 +8,6 @@ import 'dart:ui';
 
 import 'package:flutter/gestures.dart';
 import 'package:flutter/rendering.dart';
-import 'package:flutter/scheduler.dart';
-import 'package:flutter/painting.dart';
 import 'package:flutter/services.dart';
 
 import 'actions.dart';

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

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

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

@@ -5,7 +5,6 @@
 import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart';
 
-import 'basic.dart';
 import 'framework.dart';
 import 'sliver.dart';
 

packages/flutter/lib/src/widgets/sliver_layout_builder.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/rendering.dart';
 
 import 'framework.dart';

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

@@ -4,7 +4,6 @@
 
 import 'package:flutter/rendering.dart';
 
-import 'basic.dart';
 import 'framework.dart';
 import 'sliver.dart';
 

packages/flutter/lib/src/widgets/spacer.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 'package:flutter/rendering.dart';
-
 import 'basic.dart';
 import 'framework.dart';
 

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

@@ -5,7 +5,6 @@
 import 'dart:ui' as ui show TextHeightBehavior;
 
 import 'package:flutter/foundation.dart';
-import 'package:flutter/painting.dart';
 
 import 'basic.dart';
 import 'framework.dart';

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

@@ -5,7 +5,6 @@
 import 'dart:math' as math;
 
 import 'package:flutter/rendering.dart';
-import 'package:vector_math/vector_math_64.dart' show Matrix4;
 
 import 'basic.dart';
 import 'container.dart';

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

@@ -18,13 +18,10 @@ import 'dart:ui' as ui
         PointMode,
         SceneBuilder,
         Vertices;
-import 'dart:ui' show Canvas, Offset;
 
 import 'package:flutter/foundation.dart';
-import 'package:flutter/painting.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/scheduler.dart';
-import 'package:vector_math/vector_math_64.dart';
 
 import 'app.dart';
 import 'basic.dart';