Clean orphan comment translation data

<?php
require "wp-config.php";

$rows = $wpdb->get_col("SELECT t.translation_id FROM wp_icl_translations t
                LEFT JOIN wp_comments c ON t.element_id = c.comment_ID
                WHERE t.element_type = 'comment' AND c.comment_ID IS NULL");
echo sizeof($rows) . " to be deleted. ";

if (!empty($rows)) {
$affected = $wpdb->query("DELETE FROM {$wpdb->prefix}icl_translations WHERE translation_id IN (".implode(',',$rows).")");
echo $affected . " rows deleted. ";
}
?>