Revert "web: Workaround sometimes overwitten remove method"

This reverts commit ed4f0b98b2.

web/packages/core/src/ruffle-player.ts

@@ -1498,8 +1498,7 @@ export class RufflePlayer extends HTMLElement {
             );
             this.container.appendChild(preloaderElement);
         } else if (!visible && preloader) {
-            // The remove method is overwritten by a somewhat common JS library called prototype.js
-            preloader.parentNode!.removeChild(preloader);
+            preloader.remove();
         }
     }
 }