Remove "unnecessary" imports. (#82508)

dev/benchmarks/macrobenchmarks/test_driver/animated_image.dart

@@ -6,7 +6,6 @@ import 'dart:async';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_driver/driver_extension.dart';
-import 'package:flutter_test/flutter_test.dart';
 
 import 'package:macrobenchmarks/src/animated_image.dart';
 

dev/integration_tests/web_e2e_tests/test_driver/text_editing_integration.dart

@@ -7,7 +7,6 @@ import 'dart:js_util' as js_util;
 
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:integration_test/integration_test.dart';
 import 'package:web_e2e_tests/text_editing_main.dart' as app;

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/widgets/animated_size.dart

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

packages/flutter_tools/test/general.shard/custom_devices/custom_device_test.dart

@@ -8,8 +8,6 @@ import 'dart:async';
 
 import 'package:file/file.dart';
 import 'package:file/memory.dart';
-import 'package:file/src/interface/directory.dart';
-import 'package:file/src/interface/file.dart';
 import 'package:file_testing/file_testing.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/build_info.dart';

packages/flutter_tools/test/general.shard/fuchsia/fuchsia_device_start_test.dart

@@ -31,7 +31,6 @@ import 'package:mockito/mockito.dart';
 
 import '../../src/common.dart';
 import '../../src/context.dart';
-import '../../src/fake_vm_services.dart';
 import '../../src/fakes.dart';
 
 void main() {