remove comment

src/game.rs

@@ -514,9 +514,6 @@ impl Game {
             let new_id = self.add_sprite(sprite);
             insert_if_different(sprite_id_changes.borrow_mut(), old_id, new_id);
         }
-
-        // does deduplication need to be its own function?
-        // should this function just add everything and we can dedupe later?
     }
 }