Reorganize mdv and observe packages

pkg/mdv_observe/test/utils.dart

Index: pkg/mdv_observe/test/utils.dart
diff --git a/pkg/mdv_observe/test/utils.dart b/pkg/mdv_observe/test/utils.dart
deleted file mode 100644
index 5dd5e381673d55e6cd54ea7ef59bbe3ff1bc9f76..0000000000000000000000000000000000000000
--- a/pkg/mdv_observe/test/utils.dart
+++ /dev/null
@@ -1,12 +0,0 @@
-// 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 mdv_observe.test.utils;
-
-import 'package:unittest/unittest.dart';
-
-// TODO(jmesserly): use matchers when this is supported. For now just
-// compare to toStrings.
-expectChanges(actual, expected, {reason}) =>
-    expect('$actual', '$expected', reason: reason);