Remove --supermixin flag from VM.

tests/language/mixin_superclass_test.dart

+// 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.
+
+class S0 { }
+class S1 extends Object { }
+class S2 extends S0 { }
+
+class M0 { }
+class M1 extends Object { }
+class M2 extends M0 { }
+
+class C00 = S0 with M0;
+class C01 = S0 with M1;
+class C02 = S0 with M2;
+class C03 = S0 with M0, M1;
+class C04 = S0 with M0, M2;
+class C05 = S0 with M2, M0;
+class C06 = S0 with M1, M2;
+class C07 = S0 with M2, M1;
+
+class C10 = S1 with M0;
+class C11 = S1 with M1;
+class C12 = S1 with M2;
+class C13 = S1 with M0, M1;
+class C14 = S1 with M0, M2;
+class C15 = S1 with M2, M0;
+class C16 = S1 with M1, M2;
+class C17 = S1 with M2, M1;
+
+class C20 = S2 with M0;
+class C21 = S2 with M1;
+class C22 = S2 with M2;
+class C23 = S2 with M0, M1;
+class C24 = S2 with M0, M2;
+class C25 = S2 with M2, M0;
+class C26 = S2 with M1, M2;
+class C27 = S2 with M2, M1;
+
+class D00 extends S0 with M0 { }
+class D01 extends S0 with M1 { }
+class D02 extends S0 with M2 { }
+class D03 extends S0 with M0, M1 { }
+class D04 extends S0 with M0, M2 { }
+class D05 extends S0 with M2, M0 { }
+class D06 extends S0 with M1, M2 { }
+class D07 extends S0 with M2, M1 { }
+
+class D10 extends S1 with M0 { }
+class D11 extends S1 with M1 { }
+class D12 extends S1 with M2 { }
+class D13 extends S1 with M0, M1 { }
+class D14 extends S1 with M0, M2 { }
+class D15 extends S1 with M2, M0 { }
+class D16 extends S1 with M1, M2 { }
+class D17 extends S1 with M2, M1 { }
+
+class D20 extends S2 with M0 { }
+class D21 extends S2 with M1 { }
+class D22 extends S2 with M2 { }
+class D23 extends S2 with M0, M1 { }
+class D24 extends S2 with M0, M2 { }
+class D25 extends S2 with M2, M0 { }
+class D26 extends S2 with M1, M2 { }
+class D27 extends S2 with M2, M1 { }
+
+main() {
+  new C00();
+  new C01();
+  new C02();
+  new C03();
+  new C04();
+  new C05();
+  new C06();
+  new C07();
+
+  new C10();
+  new C11();
+  new C12();
+  new C13();
+  new C14();
+  new C15();
+  new C16();
+  new C17();
+
+  new C20();
+  new C21();
+  new C22();
+  new C23();
+  new C24();
+  new C25();
+  new C26();
+  new C27();
+
+  new D00();
+  new D01();
+  new D02();
+  new D03();
+  new D04();
+  new D05();
+  new D06();
+  new D07();
+
+  new D10();
+  new D11();
+  new D12();
+  new D13();
+  new D14();
+  new D15();
+  new D16();
+  new D17();
+
+  new D20();
+  new D21();
+  new D22();
+  new D23();
+  new D24();
+  new D25();
+  new D26();
+  new D27();
+}