Get rid of all the library tags.

test/request_test.dart

 // Copyright (c) 2012, 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 request_test;
-
 import 'dart:convert';
 
 import 'package:http/http.dart' as http;
 import 'package:unittest/unittest.dart';
 
 import 'utils.dart';
 
 void main() {
   group('#contentLength', () {
     test('is computed from bodyBytes', () {
@@ skipping 330 matching lines @@
   });
 
   group('#toString()', () {
     test('includes the method and URL', () {
       var request = new http.Request('POST', dummyUrl);
       expect(request.toString(), 'POST $dummyUrl');
     });
   });
 }