disable mark this forum read

[.m.]

you can remove / use comment tags for the code like below
forumbit_depth2_forum template

<img src="{$theme['imgdir']}/{$lightbulb['folder']}.gif" alt="{$lightbulb['altonoff']}" title="{$lightbulb['altonoff']}" class="ajax_mark_read" id="mark_read_{$forum['fid']}" />

forumdisplay_threadlist template

<span class="smalltext"><strong><a href="misc.php?action=markread&amp;fid={$fid}{$post_code_string}">{$lang->markforum_read}</a>