Remove bindable to promote one-way access

osu.Game/Graphics/UserInterface/OsuMenuItem.cs

@@ -2,15 +2,12 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
-using osu.Framework.Bindables;
 using osu.Framework.Graphics.UserInterface;
 
 namespace osu.Game.Graphics.UserInterface
 {
     public class OsuMenuItem : MenuItem
     {
-        public readonly Bindable<bool> Enabled = new Bindable<bool>(true);
-
         public readonly MenuItemType Type;
 
         public OsuMenuItem(string text, MenuItemType type = MenuItemType.Standard)
@@ -22,9 +19,6 @@ namespace osu.Game.Graphics.UserInterface
             : base(text, action)
         {
             Type = type;
-
-            Enabled.BindValueChanged(enabled => Action.Disabled = !enabled.NewValue);
-            Action.BindDisabledChanged(disabled => Enabled.Value = !disabled);
         }
     }
 }