bbPress.org

I suspect it is the loop-single-forum template

create a directory on your theme called ‘bbpress’
ie wp-content/%your-theme-name%/bbpress
find
wp-content/plugins/bbpress/templates/default/bbpress/loop-single-forum.php
Make a copy of this file, and put in in the directory called bbpress that you created above, so you end up with
wp-content/%your-theme-name%/bbpress/loop-single-forum.php
bbPress will now use this template instead of the original

then

remove lines 20 and 24

line 20

<?php do_action( 'bbp_theme_before_forum_subscription_action' ); ?>

line 24

<?php do_action( 'bbp_theme_after_forum_subscription_action' ); ?>

come back if that doesn’t work