Get rid of all the library tags.

test/serve/gets_first_if_git_url_changed_test.dart

Index: test/serve/gets_first_if_git_url_changed_test.dart
diff --git a/test/serve/gets_first_if_git_url_changed_test.dart b/test/serve/gets_first_if_git_url_changed_test.dart
index 9b84ce8f9feb29dcc5092f921c899d9c4d75eaa2..66f91d685d57ed2f00ba7da8a8219b0d90424a4b 100644
--- a/test/serve/gets_first_if_git_url_changed_test.dart
+++ b/test/serve/gets_first_if_git_url_changed_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';
 import 'utils.dart';