bbPress.org

just add a line

add_filter( 'bbp_get_topic_pagination_count', 'hide_topic_display' );

so you end up with

Function hide_topic_display ($retstr){
	$retstr = '' ;
	return $retstr ;
}
	
add_filter( 'bbp_get_forum_pagination_count', 'hide_topic_display' );
add_filter( 'bbp_get_topic_pagination_count', 'hide_topic_display' );

That should work !