Migrate block 163 to Dart 2.0.

tests/language_strong/typed_equality_test.dart

Index: tests/language_strong/typed_equality_test.dart
diff --git a/tests/language_strong/typed_equality_test.dart b/tests/language_strong/typed_equality_test.dart
deleted file mode 100644
index 9f48e7910b61eaa5a66e1347eccdbc91a5bdad95..0000000000000000000000000000000000000000
--- a/tests/language_strong/typed_equality_test.dart
+++ /dev/null
@@ -1,21 +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.
-
-// Regression test for http://dartbug.com/6036. dart2js used to fail
-// this method because it was computing that intersecting type D with
-// type C is conflicting.
-
-foo(a, b) {
-  if (identical(a, b)) return;
-  throw 'broken';
-}
-
-class D {}
-
-class C implements D {}
-
-main() {
-  var c = new C();
-  foo(c, c as D);
-}