Get rid of all the library tags.

test/serve/web_socket/path_to_urls_test.dart

Index: test/serve/web_socket/path_to_urls_test.dart
diff --git a/test/serve/web_socket/path_to_urls_test.dart b/test/serve/web_socket/path_to_urls_test.dart
index 7ff99a1c5347402b213e13d54f43a7e2585670f3..b006a4f94f0e3e8984d8e347962e8cc9d9d85417 100644
--- a/test/serve/web_socket/path_to_urls_test.dart
+++ b/test/serve/web_socket/path_to_urls_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 'package:path/path.dart' as p;
 import 'package:pub/src/io.dart';