Eliminate obsolete SuperNegativeTest

tests/language/src/SuperNegativeTest.dart

Index: tests/language/src/SuperNegativeTest.dart
===================================================================
--- tests/language/src/SuperNegativeTest.dart	(revision 1327)
+++ tests/language/src/SuperNegativeTest.dart	(working copy)
@@ -1,23 +0,0 @@
-// 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.
-// Missing call to super.
-
-class A {
-  A() {}
-}
-
-class B extends A {
-  // Missing call to super.
-  B() {}
-}
-
-class SuperNegativeTest {
-  static testMain() {
-    var b = new B();
-  }
-}
-
-main() {
-  SuperNegativeTest.testMain();
-}