for the ones who want to remove Whats New tab follow this steps:
AdminCP > Styles and templates > your style > Edit templates >
in the list double click on
search for the these lines and remove them
Code:
<vb:elseif condition="$show['member']" />
<li><a class="navtab" href="search.php?{vb:raw session.sessionurl}do=getnew&contenttype=vBForum_Post">{vb:rawphrase getnew_tab}</a></li>
<vb:else />
<li><a class="navtab" href="search.php?{vb:raw session.sessionurl}do=getdaily&contenttype=vBForum_Post">{vb:rawphrase getnew_tab}</a></li>
Save and you're done