Can not remove webfont.js

I use AO to reduce load time Google Fonts with webfont.js, then I want to change to other options with display=swap, but AO still show code webfont.js in source code. I tried option “leave as is”, even deactivated AO but the code webfont.js still appears. How can I remove it?

<script type="text/javascript">
    WebFontConfig = {
      google: { families: [ "Muli:regular,700","Muli:regular,regular","Muli:regular,700","Dancing+Script:regular,400", ] }
    };
    (function() {
      var wf = document.createElement('script');
      wf.src = 'https://ajax.googleapis.com/ajax/libs/webfont/1/webfont.js';
      wf.type = 'text/javascript';
      wf.async = 'true';
      var s = document.getElementsByTagName('script')[0];
      s.parentNode.insertBefore(wf, s);
    })(); </script>