Delete a bunch of packages that are now on GitHub.

pkg/path/test/utils.dart

Index: pkg/path/test/utils.dart
diff --git a/pkg/path/test/utils.dart b/pkg/path/test/utils.dart
deleted file mode 100644
index 1730798f09479c06275a190bcce69f0e355daf04..0000000000000000000000000000000000000000
--- a/pkg/path/test/utils.dart
+++ /dev/null
@@ -1,11 +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 path.test.utils;
-
-import "package:unittest/unittest.dart";
-import "package:path/path.dart" as path;
-
-/// A matcher for a closure that throws a [path.PathException].
-final throwsPathException = throwsA(new isInstanceOf<path.PathException>());