Fixed tests so they do indeed confirm that values on optional named parameters are not allowed. Add…

tests/language/named_parameters6_negative_test.dart

Index: tests/language/named_parameters6_negative_test.dart
diff --git a/tests/language/named_parameters6_negative_test.dart b/tests/language/named_parameters6_negative_test.dart
deleted file mode 100644
index 9d53ef6c2d17162349d34d8d793fe3d9621b0cea..0000000000000000000000000000000000000000
--- a/tests/language/named_parameters6_negative_test.dart
+++ /dev/null
@@ -1,13 +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 program for testing named parameters.
-
-
-// Expect a compile-time error below:
-// No default values allowed in closure type definitions.
-typedef void Callback([String msg = ""]);
-
-main() {
-  Expect.equals(true, false);
-}