Remove "unnecessary" imports in flutter_tools tests (#75012)

packages/flutter_tools/test/general.shard/test/test_compiler_test.dart

@@ -18,7 +18,6 @@ import 'package:package_config/package_config_types.dart';
 
 import '../../src/common.dart';
 import '../../src/context.dart';
-import '../../src/testbed.dart';
 
 final Platform linuxPlatform = FakePlatform(
   operatingSystem: 'linux',

packages/flutter_tools/test/general.shard/testbed_test.dart

@@ -16,7 +16,6 @@ import 'package:flutter_tools/src/base/process.dart';
 import 'package:flutter_tools/src/globals.dart' as globals;
 
 import '../src/common.dart';
-import '../src/context.dart';
 import '../src/testbed.dart';
 
 void main() {

packages/flutter_tools/test/general.shard/version_test.dart

@@ -7,7 +7,6 @@
 import 'dart:convert';
 
 import 'package:collection/collection.dart' show ListEquality;
-import 'package:flutter_tools/src/base/context.dart';
 import 'package:flutter_tools/src/base/io.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/platform.dart';

packages/flutter_tools/test/general.shard/web/devfs_web_test.dart

@@ -4,12 +4,11 @@
 
 // @dart = 2.8
 
-import 'dart:io';
+import 'dart:io' hide Directory, File;
 
 import 'package:dwds/dwds.dart';
 import 'package:flutter_tools/src/artifacts.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
-import 'package:flutter_tools/src/base/io.dart';
 import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/isolated/devfs_web.dart';

packages/flutter_tools/test/integration.shard/generated_plugin_registrant_test.dart

@@ -18,7 +18,6 @@ import 'package:flutter_tools/src/globals.dart' as globals;
 
 import '../src/common.dart';
 import '../src/context.dart';
-import '../src/testbed.dart';
 
 void main() {
   Directory tempDir;

packages/flutter_tools/test/integration.shard/plist_parser_test.dart

@@ -6,7 +6,6 @@
 
 import 'dart:convert';
 
-import 'package:file/file.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/platform.dart';

packages/flutter_tools/test/src/testbed.dart

@@ -11,7 +11,6 @@ import 'dart:io';
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/base/context.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
-import 'package:flutter_tools/src/base/io.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/os.dart';
 import 'package:flutter_tools/src/base/process.dart';
@@ -30,7 +29,6 @@ import 'package:process/process.dart';
 
 import 'common.dart' as tester;
 import 'context.dart';
-import 'fake_process_manager.dart';
 import 'throwing_pub.dart';
 
 export 'package:flutter_tools/src/base/context.dart' show Generator;

packages/integration_test/lib/_callback_web.dart

@@ -4,8 +4,6 @@
 
 import 'dart:async';
 
-import 'package:flutter_test/flutter_test.dart';
-
 import 'common.dart';
 
 /// The dart:html implementation of [CallbackManager].

packages/integration_test/test/binding_fail_test.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:async';
 import 'dart:convert';
 import 'dart:io';