Get rid of all the library tags.

test/upgrade/report/shows_newer_available_versions_test.dart

Index: test/upgrade/report/shows_newer_available_versions_test.dart
diff --git a/test/upgrade/report/shows_newer_available_versions_test.dart b/test/upgrade/report/shows_newer_available_versions_test.dart
index 568cebf6a0febbcfca09d811f3a0df92f5a9d088..2174ebcf884d7b47c080c3f1c8a86ceb6cdddd72 100644
--- a/test/upgrade/report/shows_newer_available_versions_test.dart
+++ b/test/upgrade/report/shows_newer_available_versions_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';