Remove unused dart:async import (dart-lang/http_multi_server#28)
Since Dart 2.1, Future/Stream have been exported from dart:core
diff --git a/pkgs/http_multi_server/CHANGELOG.md b/pkgs/http_multi_server/CHANGELOG.md
index eed6fab..7bf1bfb 100644
--- a/pkgs/http_multi_server/CHANGELOG.md
+++ b/pkgs/http_multi_server/CHANGELOG.md
@@ -1,3 +1,5 @@
+## 2.2.1-dev
+
## 2.2.0
- Preparation for [HttpHeaders change]. Update signature of `MultiHeaders.add()`
diff --git a/pkgs/http_multi_server/lib/src/utils.dart b/pkgs/http_multi_server/lib/src/utils.dart
index 2709dab..e9fb3b4 100644
--- a/pkgs/http_multi_server/lib/src/utils.dart
+++ b/pkgs/http_multi_server/lib/src/utils.dart
@@ -2,7 +2,6 @@
// 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.
-import 'dart:async';
import 'dart:io';
/// Returns whether this computer supports binding to IPv6 addresses.
diff --git a/pkgs/http_multi_server/pubspec.yaml b/pkgs/http_multi_server/pubspec.yaml
index 4003faa..e93015c 100644
--- a/pkgs/http_multi_server/pubspec.yaml
+++ b/pkgs/http_multi_server/pubspec.yaml
@@ -1,5 +1,5 @@
name: http_multi_server
-version: 2.2.0
+version: 2.2.1-dev
description: >-
A dart:io HttpServer wrapper that handles requests from multiple servers.
