pkg/unittest: test cleanup

pkg/unittest/test/unittest_excess_callback_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.
-
-library unittestTest;
-import 'dart:isolate';
-import 'dart:async';
-import 'package:unittest/unittest.dart';
-
-part 'unittest_test_utils.dart';
-
-var testName = 'excess callback test';
-
-var testFunction = (TestConfiguration testConfig) {
-  test(testName, () {
-    var _callback0 = expectAsync(() => ++testConfig.count);
-    var _callback1 = expectAsync(() => ++testConfig.count);
-    var _callback2 = expectAsync(() {
-      _callback1();
-      _callback1();
-      _callback0();
-    });
-    _defer(_callback2);
-  });
-};
-
-var expected = buildStatusString(0, 1, 0, testName,
-    count: 1, message: 'Callback called more times than expected (1).');