Revert "Extend the mDNS package with a native extension used on Mac OS"

tests/mdns_tests/mdns_tests.dart

Index: tests/mdns_tests/mdns_tests.dart
diff --git a/tests/mdns_tests/mdns_tests.dart b/tests/mdns_tests/mdns_tests.dart
index bdb50da2d6a62cc96c3900d5080fa63ebcead0cd..67a9e25a1a45e9d30e096726bd127e1601475373 100644
--- a/tests/mdns_tests/mdns_tests.dart
+++ b/tests/mdns_tests/mdns_tests.dart
@@ -1,19 +1,13 @@
-// Copyright (c) 2015, the Fletch project authors. Please see the AUTHORS file
+// Copyright (c) 2015, 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.md file.
+// BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
 
 import '../../pkg/mdns/test/decode_test.dart' as decode;
 import '../../pkg/mdns/test/lookup_resolver_test.dart' as lookup_resolver;
-import '../../pkg/mdns/test/native_extension_test.dart' as native_extension;
 
-typedef Future NoArgFuture();
-
-Future<Map<String, NoArgFuture>> listTests() async {
-  var tests = <String, NoArgFuture>{};
-  tests['mdns_tests/decode'] = () async => decode.main();
-  tests['mdns_tests/lookup_resolver'] = () async => lookup_resolver.main();
-  tests['mdns_tests/validate_extension'] = native_extension.main;
-  return tests;
+Future<Null> main() async {
+  decode.main();
+  lookup_resolver.main();
 }