Thats pretty easy.
Just open modifyoptions-Template...
search for:
Code:
<tr>
<td bgcolor="{ secondaltcolor}"><normalfont><b>Avatar</b></normalfont><br>
<smallfont><a href="misc.php?s=$session[sessionhash]&action=showavatars" target="_blank">More info...</a></smallfont></td>
<td bgcolor="{ secondaltcolor}"><normalfont><img src="$bbuserinfo[avatarurl]" border="0" alt="Your current avatar" align="middle"> <input type="image" src="{ imagesfolder}/clear.gif" alt="" border=""><input type="submit" class="bginput" name="modifyavatar" value="Change Avatar"></normalfont></td>
</tr>
and delete it.
Note: ... ive made spaces in the above code( { secondaltcolor}, { imagesfolder}, because of the parsing here...
Kars