/**
* Deletes filter by ID.
*
* @param integer $id
*
* @return void
*/
public function deleteById($id)
{
$filters = $this->options->getOption('filters', array());
if (array_key_exists($id, $filters)) {
unset($filters[$id]);
}
$this->options->setOption('filters', $filters);
$this->options->saveOptions();
}
