Update or delete language tests using obsolete interfaces or default factory

tests/language/interface_factory1_negative_test.dart

Index: tests/language/interface_factory1_negative_test.dart
===================================================================
--- tests/language/interface_factory1_negative_test.dart	(revision 15648)
+++ tests/language/interface_factory1_negative_test.dart	(working copy)
@@ -1,24 +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.
-//
-// Test that a "default implementation" interface factory only
-// provides the constructors declared in the interface.
-
-interface Interface default DefaultImplementation {
-  Interface.some_name();
-}
-
-class DefaultImplementation implements Interface {
-  DefaultImplementation.some_name() {}
-  DefaultImplementation.wrong_name() {}
-
-  static testMain() {
-    // We should not be able to find Interface.wrong_name().
-    new Interface.wrong_name();
-  }
-}
-
-main() {
-  DefaultImplementation.testMain();
-}