(memberlist template) Why can I there delete a usergroup and how can I do this?

[ThorstenA]

This code on memberlist template makes me curious. Is it even needed by vbulletin? And if when? I just deleted this code from my template for one product and now ask myself if it could harm me anyway.

<form action="profile.php?do=deleteusergroups&amp;usergroupid=$usergroupid" method="post">
<input type="hidden" name="do" value="deleteusergroups" />
<input type="hidden" name="s" value="$session[sessionhash]" />
<input type="hidden" name="securitytoken" value="$bbuserinfo[securitytoken]" />
<input type="hidden" name="usergroupid" value="$usergroupid" />