pkg: analysis aided cleanup

pkg/scheduled_test/test/utils.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.
 
 library test_utils;
 
-import 'dart:io';
 import 'dart:async';
 
 import 'package:scheduled_test/scheduled_test.dart';
 import 'package:scheduled_test/src/utils.dart';
 import 'package:scheduled_test/src/mock_clock.dart' as mock_clock;
 
 import 'metatest.dart';
 
 export 'package:scheduled_test/src/utils.dart';
 
@@ skipping 34 matching lines @@
 /// Sets up a timeout for every metatest in this file.
 void setUpTimeout() {
   metaSetUp(() {
     // TODO(nweiz): We used to only increase the timeout to 10s for the Windows
     // bots, but the Linux and Mac bots have started taking upwards of 5s when
     // running pumpEventQueue, so we're increasing the timeout across the board
     // (see issue 9248).
     currentSchedule.timeout = new Duration(seconds: 10);
   });
 }