Revert "Add support for multi-layer in-hand and clothing sprites" (#6521)

Content.Client/Inventory/ClientInventoryComponent.cs

@@ -30,12 +30,6 @@ namespace Content.Client.Inventory
         [ViewVariables]
         [DataField("speciesId")] public string? SpeciesId { get; set; }
 
-        /// <summary>
-        ///     Data about the current layers that have been added to the players sprite due to the items in each equipment slot.
-        /// </summary>
-        [ViewVariables]
-        public readonly Dictionary<string, HashSet<string>> VisualLayerKeys = new();
-
         public bool AttachedToGameHud;
     }
 }