You'd just have to remove them from the templates.
In forumhome_forumbit_level1_post, forumhome_forumbit_level2_post get rid of those instances:
PHP Code:
<td class="alt2">$forum[threadcount]</td>
<td class="alt1">$forum[replycount]</td>
<td class="alt2" nowrap="nowrap">$forum[lastpostinfo]</td>
<if condition="$vboptions['showmoderatorcolumn']">
<td class="alt1"><div class="smallfont">$forum[moderators] </div></td>
and then in forumhome_forumbit_level1_nopost, forumhome_forumbit_level2_nopost
play with the
PHP Code:
<td class="tcat"><span class="smallfont"> </span></td>
<td class="tcat" colspan="<if condition="$vboptions['showmoderatorcolumn']">5<else />4</if>">
Basically if you get rid of those three columns you'll probably want to change
PHP Code:
<if condition="$vboptions['showmoderatorcolumn']">5<else />4</if>">
to
PHP Code:
<if condition="$vboptions['showmoderatorcolumn']">5<else />1</if>">
Telling the forumhome that you want it to span 1 column, and not 4 columns anymore. (I'm ignoring the mod column because you don't have it enabled).
That should do it.