Get rid of all the library tags.

test/cache/repair/handles_orphaned_binstub_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 _ORPHANED_BINSTUB = """
 #!/usr/bin/env sh
 # This file was created by pub v0.1.2-3.
 # Package: foo
 # Version: 1.0.0
 # Executable: foo-script
 # Script: script
 dart "/path/to/.pub-cache/global_packages/foo/bin/script.dart.snapshot" "\$@"
 """;
 
 main() {
   integration('handles an orphaned binstub script', () {
     d.dir(cachePath, [
       d.dir('bin', [
         d.file(binStubName('script'), _ORPHANED_BINSTUB)
       ])
     ]).create();
 
     schedulePub(args: ["cache", "repair"], error: allOf([
       contains('Binstubs exist for non-activated packages:'),
       contains('From foo: foo-script')
     ]));
   });
 }