Get rid of all the library tags.

test/shelf_proxy_test.dart

Index: test/shelf_proxy_test.dart
diff --git a/test/shelf_proxy_test.dart b/test/shelf_proxy_test.dart
index fe76ddc6f08fae121407517576f73d2c652af3b2..cf70cb63dc30165f5360052bf5b577efb853f530 100644
--- a/test/shelf_proxy_test.dart
+++ b/test/shelf_proxy_test.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 shelf_proxy;
-
 import 'dart:async';
 
 import 'package:http/http.dart' as http;