If you are using 6.1 go to templates/templ_uni/scripts/functions.php

find and remove the following code: should be line 186 to 188

<span><a href="javascript:void(0);"
onclick="window.open( '<?= $site['url'] ?>presence_pop.php' , 'Presence', 'width=224,height=600,toolbar=0,directories=0,menubar=0,status=0,location=0,scrollbars=0,resizable=1');"
><?= _t('_RayPresence') ?></a></span>

Dont see more forget backup the file first.