Get rid of all the library tags.

test/hosted/offline_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS 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 'package:pub/src/exit_codes.dart' as exit_codes;
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   forBothPubGetAndUpgrade((command) {
     integration('upgrades a package using the cache', () {
       // Run the server so that we know what URL to use in the system cache.
       serveErrors();
@@ skipping 77 matching lines @@
       d.appDir({"foo": "any"}).create();
 
       createLockFile('myapp', hosted: {'foo': '1.2.4'});
 
       pubCommand(command, args: ['--offline']);
 
       d.packagesDir({"foo": "1.2.3"}).validate();
     });
   });
 }