Resolves FoldableVisualizer is Obsolete (#13913)

Content.Client/Visualizer/FoldableVisualizer.cs

@@ -1,38 +0,0 @@
-using Robust.Client.GameObjects;
-using Robust.Shared.GameObjects;
-using Robust.Shared.IoC;
-using Robust.Shared.Serialization.Manager.Attributes;
-using static Content.Shared.Foldable.SharedFoldableSystem;
-
-namespace Content.Client.Visualizer;
-
-
-public sealed class FoldableVisualizer : AppearanceVisualizer
-{
-    [DataField("key")]
-    private string _key = default!;
-
-    [Obsolete("Subscribe to AppearanceChangeEvent instead.")]
-    public override void OnChangeData(AppearanceComponent appearance)
-    {
-        base.OnChangeData(appearance);
-
-        var entManager = IoCManager.Resolve<IEntityManager>();
-
-        if (!entManager.TryGetComponent(appearance.Owner, out SpriteComponent? sprite)) return;
-
-        if (appearance.TryGetData(FoldedVisuals.State, out bool folded) && folded)
-        {
-            sprite.LayerSetState(FoldableVisualLayers.Base, $"{_key}_folded");
-        }
-        else
-        {
-            sprite.LayerSetState(FoldableVisualLayers.Base, $"{_key}");
-        }
-    }
-
-    public enum FoldableVisualLayers : byte
-    {
-        Base,
-    }
-}