Remove "unnecessary" imports. (#82662)

packages/flutter_tools/test/commands.shard/permeable/devices_test.dart

@@ -7,7 +7,6 @@
 import 'dart:convert';
 
 import 'package:args/command_runner.dart';
-import 'package:flutter_tools/src/base/context.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/commands/devices.dart';

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

@@ -9,7 +9,6 @@ import 'package:file/memory.dart';
 import 'package:file_testing/file_testing.dart';
 import 'package:flutter_tools/src/android/android_sdk.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
-import 'package:flutter_tools/src/base/io.dart' show InternetAddress, SocketException;
 import 'package:flutter_tools/src/base/io.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/os.dart';