is::dropFiasTreeDuplicates

public function dropFiasTreeDuplicates()
{
	foreach(new DirectoryIterator($this->getPoolDirName('fias_tree')) as $file)
	{
		if($file->isDot() || $file->isDir())
			continue;

		$csv = $this->getDataFromCSV('fias_tree', str_replace('.csv', '', $file->getFilename()));

		$index = array();
		foreach($csv as $id => $line)
		{
			if(isset($index[$line['ID']]))
			{
				unset($csv[$id]);
				continue;
			}

			$index[$line['ID']] = true;
		}

		$this->putDataToCSV($csv, 'fias_tree', str_replace('.csv', '', $file->getFilename()));

		unset($index);
		unset($csv);
	}
}