Mirror removals: async invoke, mirrorSystemOf(port), Mirror.mirrors.

tests/lib/mirrors/invoke_private_test.dart

Index: tests/lib/mirrors/invoke_private_test.dart
diff --git a/tests/lib/mirrors/invoke_private_test.dart b/tests/lib/mirrors/invoke_private_test.dart
index 160d3eab962f73a51f3f3014db20953cbe8ce178..091ba31dc2bbcd77d9f486d570b49b6cdc0d38cb 100644
--- a/tests/lib/mirrors/invoke_private_test.dart
+++ b/tests/lib/mirrors/invoke_private_test.dart
@@ -2,12 +2,11 @@
 // 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 test.invoke_test;
+library test.invoke_private_test;
 
 import 'dart:mirrors';
 
 import 'package:expect/expect.dart';
-import "package:async_helper/async_helper.dart";
 
 class C {
   var _field;