Migrate block 163 to Dart 2.0.

tests/language_strong/unconditional_break.dart

Index: tests/language_strong/unconditional_break.dart
diff --git a/tests/language_strong/unconditional_break.dart b/tests/language_strong/unconditional_break.dart
deleted file mode 100644
index 63ec511883d398a6e0ffc0be575f14497ccb22d4..0000000000000000000000000000000000000000
--- a/tests/language_strong/unconditional_break.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.
-
-// Test to ensure that we get don't exceptions in the SSA verifier when
-// generating phi for the return value of an inlined function that contains a
-// loop that always breaks.
-doWhileBreak() {
-  do {
-    break;
-  } while (true);
-}
-
-main() {
-  doWhileBreak();
-}