Revert "Compute frontend/backend specific constants."

tests/language/const_evaluation_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 compile-time evaluation of constants is consistent with runtime
-// evaluation.
-
-import 'dart:mirrors';
-
-import 'package:expect/expect.dart';
-
-const top_const = identical(-0.0, 0);
-final top_final = identical(-0.0, 0);
-var top_var = identical(-0.0, 0);
-
-@top_const
-class C {
-  static const static_const = identical(-0.0, 0);
-  static final static_final = identical(-0.0, 0);
-  static var static_var = identical(-0.0, 0);
-
-  final instance_final = identical(-0.0, 0);
-  var instance_var = identical(-0.0, 0);
-
-  void test() {
-    const local_const = identical(-0.0, 0);
-    final local_final = identical(-0.0, 0);
-    var local_var = identical(-0.0, 0);
-
-    Expect.equals(identical(-0.0, 0), top_const);
-    Expect.equals(top_const, top_final);
-    Expect.equals(top_final, top_var);
-    Expect.equals(top_var, static_const);
-    Expect.equals(static_const, static_final);
-    Expect.equals(static_final, static_var);
-    Expect.equals(static_var, instance_final);
-    Expect.equals(instance_final, instance_var);
-    Expect.equals(instance_var, local_const);
-    Expect.equals(local_const, local_final);
-    Expect.equals(local_final, local_var);
-    var metadata = reflectClass(C).metadata[0].reflectee; /// 01: ok
-    Expect.equals(top_const, metadata);                   /// 01: continued
-    Expect.equals(local_var, metadata);                   /// 01: continued
-  }
-}
-
-void main() {
-  new C().test();
-}