Get rid of all the library tags.

test/hijack_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.hijack_test;
-
 import 'dart:async';
 
 import 'package:test/test.dart';
 import 'package:shelf/shelf.dart';
 
 import 'test_util.dart';
 
 void main() {
   test('hijacking a non-hijackable request throws a StateError', () {
     expect(() => new Request('GET', LOCALHOST_URI).hijack((_, __) => null),
@@ skipping 70 matching lines @@
 
       var newRequest = request.change();
 
       expect(() => newRequest.hijack((_, __) => null),
           throwsA(new isInstanceOf<HijackException>()));
 
       expect(() => request.hijack((_, __) => null), throwsStateError);
     });
   });
 }