Get rid of all the library tags.

test/cache/repair/updates_binstubs_test.dart

 // Copyright (c) 2014, 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:scheduled_test/scheduled_test.dart';
 
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 const _OUTDATED_BINSTUB = """
 #!/usr/bin/env sh
 # This file was created by pub v0.1.2-3.
 # Package: foo
 # Version: 1.0.0
@@ skipping 38 matching lines @@
 
     // The broken versions should have been replaced.
     d.dir(cachePath, [
       d.dir('bin', [
         // 253 is the VM's exit code upon seeing an out-of-date snapshot.
         d.matcherFile(binStubName('foo-script'), contains('253'))
       ])
     ]).validate();
   });
 }