Migrate block 163 to Dart 2.0.

tests/language/unnamed_closure_test.dart

Index: tests/language/unnamed_closure_test.dart
diff --git a/tests/language/unnamed_closure_test.dart b/tests/language/unnamed_closure_test.dart
deleted file mode 100644
index 49fa570dc52de317974b3b329c43147ca1b43733..0000000000000000000000000000000000000000
--- a/tests/language/unnamed_closure_test.dart
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright (c) 2012, 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";
-
-getNonArray() => new A();
-
-class A {
-  operator [](index) => index;
-}
-
-main() {
-  Expect.equals(42, () {
-    var res;
-    do {
-      var a = getNonArray();
-      res = a[42];
-    } while (false);
-    return res;
-  }());
-}