IblockValues::clearValues

function clearValues()
{
	$connection = BitrixMainApplication::getConnection();
	$connection->query("
		DELETE FROM b_iblock_element_iprop
		WHERE IBLOCK_ID = ".$this->iblockId."
	");
	$connection->query("
		DELETE FROM b_iblock_section_iprop
		WHERE IBLOCK_ID = ".$this->iblockId."
	");
	$connection->query("
		DELETE FROM b_iblock_iblock_iprop
		WHERE IBLOCK_ID = ".$this->iblockId."
	");
}