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\themes\xmt\navigation\theme_usernav.html
the version i have doesn't have those exact links but it should be the same deal.
find this code and delete it.
<td><a class="button" href="http://www.link.it">First Link</a></td>
<td><a class="button" href="http://www.link.it">Second Link</a></td>
<td><a class="button" href="http://www.link.it">Third Link</a></td>
<td><a class="button" href="http://www.link.it">Fourth Link</a></td>
it shouln't have any ill effects on the layout.
remember to delete your cached version of the theme_usernav file in templates_c
