pkg: analysis aided cleanup

Removed a lot of warnings and hints when opening many pkg projects in the editor

R=gram@google.com

Review URL: https://codereview.chromium.org//22284003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/watcher@25831 260f80e4-7a28-3924-810f-c04153c831b5

pkgs/watcher/lib/src/directory_watcher.dart

diff --git a/pkgs/watcher/lib/src/directory_watcher.dart b/pkgs/watcher/lib/src/directory_watcher.dart
index 913101b..c5dd9db 100644
--- a/pkgs/watcher/lib/src/directory_watcher.dart
+++ b/pkgs/watcher/lib/src/directory_watcher.dart
@@ -5,7 +5,6 @@
 library watcher.directory_watcher;
 
 import 'dart:async';
-import 'dart:collection';
 import 'dart:io';
 
 import 'package:crypto/crypto.dart';

pkgs/watcher/test/directory_watcher_test.dart

diff --git a/pkgs/watcher/test/directory_watcher_test.dart b/pkgs/watcher/test/directory_watcher_test.dart
index 800d54d..9070179 100644
--- a/pkgs/watcher/test/directory_watcher_test.dart
+++ b/pkgs/watcher/test/directory_watcher_test.dart
@@ -2,11 +2,7 @@
 // for details. All rights reserved. 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:io';
-
 import 'package:scheduled_test/scheduled_test.dart';
-import 'package:watcher/watcher.dart';
 
 import 'utils.dart';
 

pkgs/watcher/test/no_subscription_test.dart

diff --git a/pkgs/watcher/test/no_subscription_test.dart b/pkgs/watcher/test/no_subscription_test.dart
index 8a3b031..d0a396a 100644
--- a/pkgs/watcher/test/no_subscription_test.dart
+++ b/pkgs/watcher/test/no_subscription_test.dart
@@ -3,7 +3,6 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
-import 'dart:io';
 
 import 'package:scheduled_test/scheduled_test.dart';
 import 'package:watcher/watcher.dart';

pkgs/watcher/test/ready_test.dart

diff --git a/pkgs/watcher/test/ready_test.dart b/pkgs/watcher/test/ready_test.dart
index dd799ce..11b77e0 100644
--- a/pkgs/watcher/test/ready_test.dart
+++ b/pkgs/watcher/test/ready_test.dart
@@ -3,10 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
-import 'dart:io';
 
 import 'package:scheduled_test/scheduled_test.dart';
-import 'package:watcher/watcher.dart';
 
 import 'utils.dart';