bp_get_users_of_removed_member_types()

function bp_get_users_of_removed_member_types(){
	$user_ids = array();
	// get removed profile type post ids
	$bp_member_type_ids = bp_get_removed_member_types();
	// get removed profile type names/slugs
	$bp_member_type_names = array();
	if( isset($bp_member_type_ids) && !empty($bp_member_type_ids) ){
		foreach($bp_member_type_ids as $single){
			$bp_member_type_names[] = $single['name'];
		}
	}

	// get member user ids
	if( isset($bp_member_type_names) && !empty($bp_member_type_names) ){
		foreach($bp_member_type_names as $type_name){
			$type_id = bp_member_type_type_id($type_name);
			$mb_users = bp_active_member_type_by_type($type_id);
			if( isset($mb_users) && !empty($mb_users) ){
				foreach($mb_users as $single){
					$user_ids[] = $single;
				}
			}
		}
	}

	return $user_ids;
}