Get rid of all the library tags.

test/serve/web_socket/unserve_directory_not_served_test.dart

Index: test/serve/web_socket/unserve_directory_not_served_test.dart
diff --git a/test/serve/web_socket/unserve_directory_not_served_test.dart b/test/serve/web_socket/unserve_directory_not_served_test.dart
index 90fb510499f3f08cb44ce8e6041160609aa348de..71c52675bfd542c2ad9c17ab6f70db2574205137 100644
--- a/test/serve/web_socket/unserve_directory_not_served_test.dart
+++ b/test/serve/web_socket/unserve_directory_not_served_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';