Get rid of all the library tags.

test/serve/web_socket/path_to_urls_with_line_test.dart

Index: test/serve/web_socket/path_to_urls_with_line_test.dart
diff --git a/test/serve/web_socket/path_to_urls_with_line_test.dart b/test/serve/web_socket/path_to_urls_with_line_test.dart
index e511271994103c80cd37514f5465e8755c0891d7..051a1d10da3a94e4da8d2f1033176609b01bf441 100644
--- a/test/serve/web_socket/path_to_urls_with_line_test.dart
+++ b/test/serve/web_socket/path_to_urls_with_line_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 '../../descriptor.dart' as d;