Merge pull request #581 from kevmoo/polymer

example/todomvc/test/test.dart

 #!/usr/bin/env dart
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // 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:io';
 import 'package:polymer/testing/content_shell_test.dart';
 import 'package:unittest/compact_vm_config.dart';
 
 void main() {
   useCompactVMConfiguration();
   // Base directory, input, expected, output:
   renderTests('..', '.', 'expected', 'out');
 }