fix(ui): simplify iframe attributes in single layout

Removed unnecessary attributes from the iframe element as these were for codesandbox.io

themes/aurelia-theme/layouts/playground/single.html

@@ -18,9 +18,7 @@ <h2 class="text-2xl font-semibold text-gray-900">{{ .title }}</h2>
           </div>
           <iframe data-src="{{ .url }}"
                   class="w-full h-full rounded-xl opacity-0 transition-opacity duration-300"
-                  title="{{ .title }} Example"
-                  allow="accelerometer; ambient-light-sensor; camera; encrypted-media; geolocation; gyroscope; hid; microphone; midi; payment; usb; vr; xr-spatial-tracking"
-                  sandbox="allow-forms allow-modals allow-popups allow-presentation allow-same-origin allow-scripts">
+                  title="{{ .title }} Example">
           </iframe>
         </div>
       </article>