Revert "Reapply "Implement new model for class members." and "Implement new model for interface mem…

tests/language/cyclic_metadata_test.dart

-// Copyright (c) 2014, 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.
-
-// Check that metadata on a class 'Super' using subtypes of 'Super' are not
-// considered as cyclic inheritance or lead to crashes.
-
-@Sub1(0) /// 01: ok
-class Super {
-  final field;
-  @Sub2(1) /// 02: ok
-  const Super(this.field);
-}
-
-class Sub1 extends Super {
-  const Sub1(var field) : super(field);
-}
-
-class Sub2 extends Super {
-  const Sub2(var field) : super(field);
-}
-
-void main() {
-  print(new Super(1));
-}