Using 'interface' and 'abstract' for methods should produce error

compiler/javatests/com/google/dart/compiler/type/interfaces.dart

Index: compiler/javatests/com/google/dart/compiler/type/interfaces.dart
diff --git a/compiler/javatests/com/google/dart/compiler/type/interfaces.dart b/compiler/javatests/com/google/dart/compiler/type/interfaces.dart
deleted file mode 100644
index deccd201b51c4e1a71705328c24908aa1637256e..0000000000000000000000000000000000000000
--- a/compiler/javatests/com/google/dart/compiler/type/interfaces.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.
-
-interface Super<T> {}
-
-interface Sub<S> extends Super<S> default SubImplementation<S> {
-  Sub();
-}
-
-class SubImplementation<U> implements Sub<U> {
-  SubImplementation() {}
-}