Remove --supermixin flag from VM.

tests/language/mixin_illegal_super_use_test.dart

Index: tests/language/mixin_illegal_super_use_test.dart
diff --git a/tests/language/mixin_illegal_super_use_test.dart b/tests/language/mixin_illegal_super_use_test.dart
deleted file mode 100644
index 7f0d64a39de0173b8d9520ae6c9decd24064d1d4..0000000000000000000000000000000000000000
--- a/tests/language/mixin_illegal_super_use_test.dart
+++ /dev/null
@@ -1,71 +0,0 @@
-// Copyright (c) 2013, 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.
-
-import "package:expect/expect.dart";
-
-class M {
-}
-
-class P0 {
-  foo() {
-    super.toString();    /// 01: compile-time error
-    super.foo();         /// 02: compile-time error
-    super.bar = 100;     /// 03: compile-time error
-
-    void inner() {
-      super.toString();  /// 04: compile-time error
-      super.foo();       /// 05: compile-time error
-      super.bar = 100;   /// 06: compile-time error
-    }
-    inner();
-
-    (() {
-      super.toString();  /// 07: compile-time error
-      super.foo();       /// 08: compile-time error
-      super.bar = 100;   /// 09: compile-time error
-    })();
-
-    return 42;
-  }
-}
-
-class P1 {
-  bar() {
-    super.toString();    /// 10: compile-time error
-    return 87;
-  }
-
-  // The test method is strategically placed here to try to force the
-  // P1 class and its bar method to be resolved before resolving the
-  // mixin applications.
-  test() {
-    new C();
-    var d = new D();
-    var e = new E();
-    var f = new F();
-    Expect.equals(42, d.foo());
-    Expect.equals(87, e.bar());
-    Expect.equals(99, f.baz());
-  }
-}
-
-class P2 {
-  baz() {
-    super.toString();   /// 11: compile-time error
-    return 99;
-  }
-}
-
-class C = Object with M;
-class D = Object with P0;
-class E = Object with M, P1;
-class F = Object with P2, M;
-
-main() {
-  var p1 = new P1();
-  var p2 = new P2();
-  Expect.equals(87, p1.bar());
-  p1.test();
-  Expect.equals(99, p2.baz());
-}