jquery version

Hi,

I thought Sydney no longer uses jquery so why is it still in the page source?

I’m only asking as the versions used are outdated and vulnerable apparently, I would like to update them

<script type='text/javascript' src='https://appletreesnursery.com/wp-includes/js/jquery/ui/core.min.js?ver=1.12.1' id='jquery-ui-core-js'></script>
<script type='text/javascript' src='https://appletreesnursery.com/wp-includes/js/jquery/ui/mouse.min.js?ver=1.12.1' id='jquery-ui-mouse-js'></script>
<script type='text/javascript' src='https://appletreesnursery.com/wp-includes/js/jquery/ui/draggable.min.js?ver=1.12.1' id='jquery-ui-draggable-js'></script>
<script type='text/javascript' src='https://appletreesnursery.com/wp-includes/js/underscore.min.js?ver=1.13.1' id='underscore-js'></script>