Get rid of all the library tags.

test/create_middleware_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 shelf.create_middleware_test;
-
 import 'dart:async';
 
 import 'package:shelf/shelf.dart';
 import 'package:test/test.dart';
 
 import 'test_util.dart';
 
 void main() {
   test('forwards the request and response if both handlers are null', () {
     var handler = const Pipeline()
@@ skipping 210 matching lines @@
       expect(makeSimpleRequest(handler),
           throwsA(new isInstanceOf<HijackException>()));
     });
   });
 }
 
 _failHandler(Request request) => fail('should never get here');
 
 final Response _middlewareResponse =
     new Response.ok('middleware content', headers: {'from': 'middleware'});