Revert "Migrating a block of dart 2:"

tests/language_2/closure_internals_test.dart

Index: tests/language_2/closure_internals_test.dart
diff --git a/tests/language_2/closure_internals_test.dart b/tests/language_2/closure_internals_test.dart
deleted file mode 100644
index 61e5b2beb2ed227275b2dc06972b9b48f23db377..0000000000000000000000000000000000000000
--- a/tests/language_2/closure_internals_test.dart
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright (c) 2013, 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 file.
-
-import "package:expect/expect.dart";
-
-class C {
-  foo() => 123;
-}
-
-main() {
-  var f = new C().foo;
-  var target = f.target; //# 01: compile-time error
-  var self = f.self; //# 02: compile-time error
-  var receiver = f.receiver; //# 03: compile-time error
-}