Delete attachment

Hi,
For delete your attachement at the post
Copy past this in file function.php :

function delete_attachments($post_id) {
	$args = array(
		'post_type' => 'attachment',
		'numberposts' => -1,
		'post_status' => null,
		'post_parent' => $post_id
	);
	$attachments = get_posts($args);
	
	if ($attachments) {
		foreach($attachments as $attachment) {
			wp_delete_attachment($attachment->ID, true);
			
		}
	}
}

add_action('before_delete_post', 'delete_attachments');

And if you have idea for delete attachment just for listing say me.
I tried ‘post_type’ =>’listing’, but not work