Remove the http package from the repo.

pkg/http/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);
-    });
-  });
-}