Migrating a block of dart 1 tests to dart 2

tests/language_strong/closure2_test.dart

Index: tests/language_strong/closure2_test.dart
diff --git a/tests/language_strong/closure2_test.dart b/tests/language_strong/closure2_test.dart
deleted file mode 100644
index bf3cf01e0e937e6484a446f2d84add69cc1f31ab..0000000000000000000000000000000000000000
--- a/tests/language_strong/closure2_test.dart
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright (c) 2011, 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.
-// Dart test for closures.
-
-import "package:expect/expect.dart";
-
-bounce(fn) {
-  return fn();
-}
-
-demo(s) {
-  var i, a = bounce(() => s);
-  return a;
-}
-
-main() {
-  Expect.equals("Bounce!", demo("Bounce!"));
-}