JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
   <li>Keep This Text
      <a>Keep This Text</a>
   </li>
   <li>Keep This Text
      <a>Keep This Text</a>
   </li>
   <b class="warning">Comments:</b>Remove preceeding b.warning if no text here
</ul>

JavaScript

if($('b')[0].nextSibling) {
  $('b')[0].nextSibling.nodeValue = '';
  $('b.warning').hide();
}