test rename overhaul: step 8 - language tests

tests/language/src/GenericInstanceofTest.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 instanceof works correctly with type variables.
-
-#library("GenericInstanceofTest.dart");
-#source("GenericInstanceof.dart");
-
-main() {
-  // Repeat type checks so that inlined tests can be tested as well.
-  for (int i = 0; i < 5; i++) {
-    GenericInstanceof.testMain();
-  }
-}