Get rid of all the library tags.

test/serve/web_socket/serve_directory_and_immediately_unserve_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS d.file
 // 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 'dart:async';
 
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 import '../utils.dart';
 
 main() {
   integration("binds a directory to a new port and immediately unbinds that "
@@ skipping 26 matching lines @@
         // server that was turned off. We're asserting that the same server was
         // both started and stopped.
         expect(results[0]["result"]["url"], matches(r"http://localhost:\d+"));
         expect(results[0]["result"], equals(results[1]["result"]));
       });
     });
 
     endPubServe();
   });
 }