Get rid of all the library tags.

test/test_util.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 shelf.test_util;
-
 import 'dart:async';
 
 import 'package:shelf/shelf.dart';
 
 // "hello,"
 const HELLO_BYTES = const [104, 101, 108, 108, 111, 44];
 
 // " world"
 const WORLD_BYTES = const [32, 119, 111, 114, 108, 100];
 
@@ skipping 12 matching lines @@
 Future<Response> asyncHandler(Request request) =>
     new Future(() => syncHandler(request));
 
 /// Makes a simple GET request to [handler] and returns the result.
 Future<Response> makeSimpleRequest(Handler handler) =>
     new Future.sync(() => handler(_request));
 
 final _request = new Request('GET', LOCALHOST_URI);
 
 final LOCALHOST_URI = Uri.parse('http://localhost/');