Modernize the package's style.

lib/src/stream_sink_transformer/stream_transformer_wrapper.dart

Index: lib/src/stream_sink_transformer/stream_transformer_wrapper.dart
diff --git a/lib/src/stream_sink_transformer/stream_transformer_wrapper.dart b/lib/src/stream_sink_transformer/stream_transformer_wrapper.dart
index b53f20865c92edf5fd6ec50702faa1dd31311dc6..83d2b19710f5bd65218451a757c6e9c900f3cb65 100644
--- a/lib/src/stream_sink_transformer/stream_transformer_wrapper.dart
+++ b/lib/src/stream_sink_transformer/stream_transformer_wrapper.dart
@@ -2,8 +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.
 
-library async.stream_sink_transformer.stream_transformer_wrapper;
-
 import 'dart:async';
 
 import '../stream_sink_transformer.dart';