Delete a bunch of packages that are now on GitHub.

pkg/http_throttle/lib/http_throttle.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 http_throttle;
-
-import 'dart:async';
-
-import 'package:http/http.dart';
-import 'package:pool/pool.dart';
-
-/// A middleware client that throttles the number of concurrent requests.
-///
-/// As long as the number of requests is within the limit, this works just like
-/// a normal client. If a request is made beyond the limit, the underlying HTTP
-/// request won't be sent until other requests have completed.
-class ThrottleClient extends BaseClient {
-  final Pool _pool;
-  final Client _inner;
-
-  /// Creates a new client that allows no more than [maxActiveRequests]
-  /// concurrent requests.
-  ///
-  /// If [inner] is passed, it's used as the inner client for sending HTTP
-  /// requests. It defaults to `new http.Client()`.
-  ThrottleClient(int maxActiveRequests, [Client inner])
-      : _pool = new Pool(maxActiveRequests),
-        _inner = inner == null ? new Client() : inner;
-
-  Future<StreamedResponse> send(BaseRequest request) {
-    return _pool.request().then((resource) {
-      return _inner.send(request).then((response) {
-        var stream = response.stream.transform(
-            new StreamTransformer.fromHandlers(handleDone: (sink) {
-          resource.release();
-          sink.close();
-        }));
-        return new StreamedResponse(stream, response.statusCode,
-            contentLength: response.contentLength,
-            request: response.request,
-            headers: response.headers,
-            isRedirect: response.isRedirect,
-            persistentConnection: response.persistentConnection,
-            reasonPhrase: response.reasonPhrase);
-      });
-    });
-  }
-
-  void close() => _inner.close();
-}