Fix cancel firing arc placement bug

src/modules/game/firing_arc.js

@@ -294,7 +294,7 @@ function set(svg, size, counter, { x, y }) {
   function cancelPlacementListener(e) {
     e.preventDefault();
 
-    get(counter).forEach(el => el.remove());
+    get(svg, counter).forEach(el => el.remove());
     grid.removeAttribute('style');
     svg.removeEventListener('mousemove', positionListener);
   }