No Kartra Pre-Checked Embedded Radio Buttons

<!-- No preselected radio buttons on Kartra external form embed -->
<script>
(function (bmo) {
    bmo.observe(document.body, { childList: true, subtree: true });
})(new MutationObserver(function () {
jQuery('.kartra-optin-radio input').attr('checked', false);
}));
</script>