Folder::deleteForSite

static function deleteForSite(int $siteId): void
{
	$res = self::getList([
		'select' => [
			'ID'
		],
		'filter' => [
			'SITE_ID' => $siteId
		]
	]);
	while ($row = $res->fetch())
	{
		parent::delete($row['ID']);
	}
}