Migrate block 162 to Dart 2.0.

tests/language/type_variable_closure4_test.dart

Index: tests/language/type_variable_closure4_test.dart
diff --git a/tests/language/type_variable_closure4_test.dart b/tests/language/type_variable_closure4_test.dart
deleted file mode 100644
index e75bc085dc16f134f4259bcc0a0deca6b08f995e..0000000000000000000000000000000000000000
--- a/tests/language/type_variable_closure4_test.dart
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file

[eernst, 2017/09/04 17:04:57]

Lost coverage: don't delete this 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";
-
-class A<T> {}
-
-class C<T> {
-  map() {
-    return () => <T, T>{};
-  }
-}
-
-main() {
-  Expect.isTrue(new C<int>().map()() is Map<int, int>);
-  Expect.isFalse(new C<int>().map()() is Map<String, int>);
-  Expect.isFalse(new C<int>().map()() is Map<int, String>);
-}