Remove "unnecessary" imports. (#81003)

packages/flutter_tools/test/commands.shard/hermetic/assemble_test.dart

@@ -21,7 +21,6 @@ import '../../src/context.dart';
 import '../../src/fakes.dart';
 import '../../src/test_build_system.dart';
 import '../../src/test_flutter_command_runner.dart';
-import '../../src/testbed.dart';
 
 void main() {
   Cache.disableLocking();

packages/flutter_tools/test/commands.shard/hermetic/build_ios_test.dart

@@ -11,12 +11,10 @@ import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/commands/build.dart';
 import 'package:flutter_tools/src/ios/xcodeproj.dart';
 import 'package:flutter_tools/src/reporting/reporting.dart';
-import 'package:process/process.dart';
 
 import '../../src/common.dart';
 import '../../src/context.dart';
 import '../../src/test_flutter_command_runner.dart';
-import '../../src/testbed.dart';
 
 class FakeXcodeProjectInterpreterWithBuildSettings extends FakeXcodeProjectInterpreter {
   @override

packages/flutter_tools/test/commands.shard/hermetic/build_test.dart

@@ -8,7 +8,6 @@ import 'package:args/command_runner.dart';
 import 'package:flutter_tools/src/base/common.dart';
 import 'package:flutter_tools/src/runner/flutter_command.dart';
 
-import '../../src/common.dart';
 import '../../src/context.dart';
 import '../../src/test_flutter_command_runner.dart';
 

packages/flutter_tools/test/commands.shard/hermetic/build_windows_test.dart

@@ -14,14 +14,12 @@ import 'package:flutter_tools/src/commands/build_winuwp.dart';
 import 'package:flutter_tools/src/features.dart';
 import 'package:flutter_tools/src/reporting/reporting.dart';
 import 'package:flutter_tools/src/windows/visual_studio.dart';
-import 'package:process/process.dart';
 import 'package:test/fake.dart';
 
 import '../../src/common.dart';
 import '../../src/context.dart';
 import '../../src/fakes.dart';
 import '../../src/test_flutter_command_runner.dart';
-import '../../src/testbed.dart';
 
 const String flutterRoot = r'C:\flutter';
 const String buildFilePath = r'C:\windows\CMakeLists.txt';

packages/flutter_tools/test/commands.shard/hermetic/create_usage_test.dart

@@ -14,7 +14,6 @@ import 'package:flutter_tools/src/doctor_validator.dart';
 import 'package:flutter_tools/src/globals_null_migrated.dart' as globals;
 import 'package:flutter_tools/src/reporting/reporting.dart';
 
-import '../../src/common.dart';
 import '../../src/context.dart';
 import '../../src/test_flutter_command_runner.dart';
 import '../../src/testbed.dart';

packages/flutter_tools/test/commands.shard/hermetic/generate_localizations_test.dart

@@ -12,7 +12,6 @@ import 'package:flutter_tools/src/commands/generate_localizations.dart';
 import 'package:flutter_tools/src/runner/flutter_command.dart';
 
 import '../../integration.shard/test_data/basic_project.dart';
-import '../../src/common.dart';
 import '../../src/context.dart';
 import '../../src/test_flutter_command_runner.dart';