DoAfter Refactor (#13225)

Co-authored-by: DrSmugleaf <drsmugleaf@gmail.com>

Content.Server/Storage/Components/ServerStorageComponent.cs

@@ -30,11 +30,6 @@ namespace Content.Server.Storage.Components
         [DataField("areaInsert")]
         public bool AreaInsert = false;  // "Attacking" with the storage entity causes it to insert all nearby storables after a delay
 
-        /// <summary>
-        /// Token for interrupting area insert do after.
-        /// </summary>
-        public CancellationTokenSource? CancelToken;
-
         [DataField("areaInsertRadius")]
         public int AreaInsertRadius = 1;