remove unused imports

packages/connectivity/connectivity/example/test_driver/integration_test/connectivity_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:io';
 import 'package:integration_test/integration_test.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:connectivity/connectivity.dart';

packages/connectivity/connectivity/integration_test/connectivity_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:io';
 import 'package:integration_test/integration_test.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:connectivity/connectivity.dart';

packages/connectivity/connectivity/lib/connectivity.dart

@@ -4,7 +4,6 @@
 
 import 'dart:async';
 
-import 'package:flutter/services.dart';
 import 'package:connectivity_platform_interface/connectivity_platform_interface.dart';
 
 // Export enums from the platform_interface so plugin users can use them directly.