Revert "Allow closures inside lazy initializers."

tests/language/lazy_static5_test.dart

Index: tests/language/lazy_static5_test.dart
diff --git a/tests/language/lazy_static5_test.dart b/tests/language/lazy_static5_test.dart
deleted file mode 100644
index 00b30bb2afc6295d8bcb596831bf8bb5bb51154e..0000000000000000000000000000000000000000
--- a/tests/language/lazy_static5_test.dart
+++ /dev/null
@@ -1,10 +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.
-
-final x = (t) => (u) => t + u;
-
-main() {
-  Expect.equals(499, x(498)(1));
-  Expect.equals(42, x(39)(3));
-}