Get rid of all the library tags.

test/cache/add/adds_latest_matching_version_test.dart

Index: test/cache/add/adds_latest_matching_version_test.dart
diff --git a/test/cache/add/adds_latest_matching_version_test.dart b/test/cache/add/adds_latest_matching_version_test.dart
index 829d0df56269d89349e37b46fa6ef13c2699eedb..0b223c36c52e466698b4f6e4f64d4f93b04e235d 100644
--- a/test/cache/add/adds_latest_matching_version_test.dart
+++ b/test/cache/add/adds_latest_matching_version_test.dart
@@ -2,8 +2,6 @@
 // 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 pub_tests;
-
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';