Migrate block 163 to Dart 2.0.

tests/language_strong/unbalanced_brace_test.dart

Index: tests/language_strong/unbalanced_brace_test.dart
diff --git a/tests/language_strong/unbalanced_brace_test.dart b/tests/language_strong/unbalanced_brace_test.dart
deleted file mode 100644
index 7f5381a269cb4ac25c16870afa7e704217a1785a..0000000000000000000000000000000000000000
--- a/tests/language_strong/unbalanced_brace_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.
-
-// Test syntax errors related to unterminated braces.
-
-class A {
-  m() {
-  /* //# 01: compile-time error
-  }
-  // */
-
-/* //# 02: compile-time error
-}
-// */
-
-class B {}
-
-main() {
-  new A();
-  new B();
-}