test rename overhaul: step 8 - language tests

tests/language/interface_function_type_alias2_negative_test.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.
 
 // Test that deprecated syntax for introducing function type aliases
 // using the interface keyword isn't valid anymore.
 
 interface void f();
 
 main() {
   InterfaceFunctionTypeAlias2NegativeTest.testMain();
 }