Migrating a block of dart 1 tests to dart 2

tests/language_strong/closure8_test.dart

Index: tests/language_strong/closure8_test.dart
diff --git a/tests/language_strong/closure8_test.dart b/tests/language_strong/closure8_test.dart
deleted file mode 100644
index 211c7223d7df9e44709bc8e18813b4aef3bf26f1..0000000000000000000000000000000000000000
--- a/tests/language_strong/closure8_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.
-// Regression test for issue 6353.
-
-class A<E> {}
-
-class C<E> extends A<E> {
-  forEach(callback(E element)) {}
-}
-
-class D<E> {
-  lala(E element) {}
-}
-
-main() {
-  var c = new C<int>();
-  c.forEach(new D<int>().lala);
-}