Oh, you want it completely to not show a comment box option?

Then try looking for these and edit them out on the index, category, page template and on the single page php's in your admin/appearance/editor

<?php comments_template(); ?>
<?php _e('comments:'); ?> <?php comments_popup_link('No Comments', '1 Comment', '% Comments'); ?>
Just be sure you make a backup copy of any pages you want to edit onto your hard drive before you start deleting stuff