Find the template and remove the code.
To find the template to modify, do this - vboptions > General Settings > Add Template Name in HTML Comments > set to Yes . Then go back to your page and view the source code and you will see the name of the template called around your part of the code. (Sometimes the template is the one mentioned at the very top of the page source.)
MEMBERINFO:
<li><a href="search.php?{vb:raw session.sessionurl}do=finduser&userid={vb:raw userinfo.userid}&contenttype=vBForum_Post&showpost s=1"><img src="{vb:stylevar imgdir_siteicons}/forum.png" alt="{vb:rawphrase find_all_posts}" class="inlineimg" /> {vb:rawphrase find_all_posts}</a></li>