public function removeRole($contentId, $roleId)
{
$query = $this->handler->createDeleteQuery();
$query->deleteFrom($this->handler->quoteTable('ezuser_role'))->where($query->expr->lAnd($query->expr->eq($this->handler->quoteColumn('contentobject_id'), $query->bindValue($contentId, null, \PDO::PARAM_INT)), $query->expr->eq($this->handler->quoteColumn('role_id'), $query->bindValue($roleId, null, \PDO::PARAM_INT))));
$query->prepare()->execute();
}