Try (haven’t tested)
function remove_website ($r) {
$r['bbp_anonymous_website'] = false;
return $r ;
}
add_filter( ‘bbp_pre_anonymous_post_author_website’, ‘remove_website’ );
or
function remove_website ($r) {
$r['bbp_anonymous_website'] = false;
return $r['bbp_anonymous_website'] ;
}
add_filter( ‘bbp_pre_anonymous_post_author_website’, ‘remove_website’ );