test rename overhaul: step 8 - language tests

tests/language/src/Library6NegativeTest.dart

-// Copyright (c) 2012, 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.
-
-// This tests that it is a compile-time error to both import a library
-// that defines a function type alias and to have a local definition for
-// another function type alias with the same name.
-// This name conflict is considered an error even if Fun is never referred to.
-
-#library("Library6NegativeTest.dart");
-#import("Library5a.dart");  // Defines function type alias Fun
-
-typedef int Fun();  // Conflicts with definition of Fun from library5a
-
-main() {
-}
-