delete un-attached images

gistfile1.php

<?php

$args = array(
	'author' => 3, 
	'post_status' => 'any',
	'post_mime_type'=>'image',
	'post_type'   => 'attachment',
	'nopaging' => true,
        'post_parent' => 0,
	'date_query' => array('before' => '-10 day'),
);


$query = new WP_Query ($args);
while ($query->have_posts ()) {
    $query->the_post ();
    $id = get_the_ID ();
    $the_author = get_the_author();
    $date = get_the_date();
    $title = get_the_title();
    $url = wp_get_attachment_url($id);
    echo "$id - $date - $the_author - $title - $url\n";
    wp_delete_post( $id, true);
  }
wp_reset_postdata ();