Get rid of all the library tags.

test/serve/web_socket/path_to_urls_errors_test.dart

Index: test/serve/web_socket/path_to_urls_errors_test.dart
diff --git a/test/serve/web_socket/path_to_urls_errors_test.dart b/test/serve/web_socket/path_to_urls_errors_test.dart
index a7a4d795c798a08f73fb2b38f94e3dc296c1b488..e500ab56358d82a041f36aef232b7b794bb1546d 100644
--- a/test/serve/web_socket/path_to_urls_errors_test.dart
+++ b/test/serve/web_socket/path_to_urls_errors_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:json_rpc_2/error_code.dart' as rpc_error_code;
 import 'package:path/path.dart' as p;