pkg: analysis aided cleanup

pkg/scheduled_test/test/scheduled_test/current_schedule_state_test.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:async';
-import 'dart:io';
-
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../metatest.dart';
 import '../utils.dart';
 
 void main() {
   setUpTimeout();
 
   expectTestsPass('currentSchedule.state starts out as SET_UP', () {
     test('test', () {
@@ skipping 17 matching lines @@
     var oldSchedule;
     test('test 1', () {
       oldSchedule = currentSchedule;
     });
 
     test('test 2', () {
       expect(oldSchedule.state, equals(ScheduleState.DONE));
     });
   });
 }