Get rid of all the library tags.

test/streamed_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 streamed_request_test;
-
 import 'package:http/http.dart' as http;
 import 'package:unittest/unittest.dart';
 
 import 'utils.dart';
 
 void main() {
   group('contentLength', () {
     test('defaults to null', () {
       var request = new http.StreamedRequest('POST', dummyUrl);
       expect(request.contentLength, isNull);
     });
 
     test('disallows negative values', () {
       var request = new http.StreamedRequest('POST', dummyUrl);
       expect(() => request.contentLength = -1, throwsArgumentError);
     });
 
     test('is frozen by finalize()', () {
       var request = new http.StreamedRequest('POST', dummyUrl);
       request.finalize();
       expect(() => request.contentLength = 10, throwsStateError);
     });
   });
 }