test rename overhaul: step 8 - language tests

tests/language/src/IsNotClass4NegativeTest.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.
-// Dart test program to test that the parser emits an error when
-// two 'is' expressions follow each other.
-
-class A {
-  const A();
-}
-
-class IsNotClass4NegativeTest {
-  static testMain() {
-    var a = new A();
-
-    if (a is A is A) {
-      return 0;
-    }
-    return 0;
-  }
-}
-
-main() {
-  IsNotClass4NegativeTest.testMain();
-}