Delete a bunch of packages that are now on GitHub.

pkg/stack_trace/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 stack_trace.test.utils;
-
-import 'package:unittest/unittest.dart';
-
-/// Returns a matcher that runs [matcher] against a [Frame]'s `member` field.
-Matcher frameMember(matcher) =>
-  transform((frame) => frame.member, matcher, 'member');
-
-/// Returns a matcher that runs [matcher] against a [Frame]'s `library` field.
-Matcher frameLibrary(matcher) =>
-  transform((frame) => frame.library, matcher, 'library');
-
-/// Returns a matcher that runs [transformation] on its input, then matches
-/// the output against [matcher].
-///
-/// [description] should be a noun phrase that describes the relation of the
-/// output of [transformation] to its input.
-Matcher transform(transformation(value), matcher, String description) =>
-  new _TransformMatcher(transformation, wrapMatcher(matcher), description);
-
-class _TransformMatcher extends Matcher {
-  final Function _transformation;
-  final Matcher _matcher;
-  final String _description;
-
-  _TransformMatcher(this._transformation, this._matcher, this._description);
-
-  bool matches(item, Map matchState) =>
-    _matcher.matches(_transformation(item), matchState);
-
-  Description describe(Description description) =>
-    description.add(_description).add(' ').addDescriptionOf(_matcher);
-}