/**
     * remove the create privilege from the given access level in the given access
     * control list
     * @param array accessControlList access control list
     * @param string accessLevel access level
     * @return boolean true on success, false if accessLevel or
     *      privilege are not valid
     */
    static function removeCreatePrivilegeFromAccessLevel(&$accessControlList, $accessLevel) {
        $privilege = 'create';

        return WikiAccessControl::removePrivilegeFromAccessLevel(
                        $accessControlList
                        , $accessLevel
                        , $privilege
        );
    }