Migrate test block 113 to Dart 2.0.

tests/language_strong/generic_async_star_test.dart

Index: tests/language_strong/generic_async_star_test.dart
diff --git a/tests/language_strong/generic_async_star_test.dart b/tests/language_strong/generic_async_star_test.dart
deleted file mode 100644
index cf18af84924948a71e6e6420322cdd082319b6b7..0000000000000000000000000000000000000000
--- a/tests/language_strong/generic_async_star_test.dart
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright (c) 2016, 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";
-
-import 'dart:async';
-
-Stream/*<T>*/ foo/*<T>*/(/*=T*/ x) async* {
-  for (int i = 0; i < 3; i++) {
-    yield x;
-  }
-}
-
-main() async {
-  await for (var x in foo/*<int>*/(1)) {
-    Expect.equals(1, x);
-  }
-}