Get rid of all the library tags.

test/descriptor/git.dart

 // Copyright (c) 2013, 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 descriptor.git;
-
 import 'dart:async';
 
 import 'package:path/path.dart' as path;
 import 'package:pub/src/git.dart' as git;
 import 'package:scheduled_test/scheduled_test.dart';
 import 'package:scheduled_test/descriptor.dart';
 
 /// Describes a Git repository and its contents.
 class GitRepoDescriptor extends DirectoryDescriptor {
   GitRepoDescriptor(String name, List<Descriptor> contents)
@@ skipping 51 matching lines @@
       'GIT_COMMITTER_EMAIL': 'pub@dartlang.org'
     };
 
     if (parent == null) parent = defaultRoot;
     return git.run(args,
         workingDir: path.join(parent, name),
         environment: environment);
   }
 }