test rename overhaul: step 8 - language tests

tests/language/src/NonParameterizedFactory2Test.dart

-// 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.
-
-// The list of type parameters in the default factory clause can be omitted.
-
-interface Interface<T> default Factory {
-  Interface();
-  Interface.withArg(T value);
-}
-
-class Factory<T> {
-  factory Interface() {
-    return null;
-  }
-
-  factory Interface.withArg(value) {
-    return null;
-  }
-}
-
-main() {
-  new Interface<int>();
-  new Interface<int>.withArg(4);
-}