VoteUserType::onDelete

static function onDelete($userField, $value)
{
	if (empty($value))
		return;
	$userFieldManager = Manager::getInstance($userField);

	[$type, $realValue] = self::detectType($value);
	$attach = ($type == self::TYPE_SAVED_ATTACH ? $userFieldManager->loadFromAttachId($realValue) :
		($realValue > 0 ? $userFieldManager->loadFromVoteId($realValue) : $userFieldManager->loadEmptyObject()));

	global $USER;
	if ($userFieldManager->belongsToEntity($attach, $userField['ENTITY_ID'], $userField['ENTITY_VALUE_ID']) && $attach->canEdit($USER->getId()))
		$attach->delete();
}