CAccess::OnUserDelete

static function OnUserDelete($USER_ID)
{
	global $DB;
	$USER_ID = intval($USER_ID);

	$DB->Query("delete from b_user_access where user_id=" . $USER_ID);
	$DB->Query("delete from b_user_access_check where user_id=" . $USER_ID);

	//all providers for one user
	foreach (static::$arChecked as $provider => $dummy)
	{
		static::ClearCheckCache($provider, $USER_ID);
	}

	static::ClearCache($USER_ID);

	return true;
}