[4.0] Alert close (#34854)

The padding of the close X on joomla-alerts was changed with the UI repaint but the rtl override was kept in error.

### Before

### After

Author: brianteeman

administrator/templates/atum/scss/vendor/joomla-custom-elements/joomla-alert.scss

@@ -125,7 +125,6 @@
     [dir=rtl] & {
       right: auto;
       left: 0;
-      padding: .2rem .6rem;
     }
   }