function queues_configprocess_ivr()
{
    $action = isset($_REQUEST['action']) ? $_REQUEST['action'] : null;
    $display = isset($_REQUEST['display']) ? $_REQUEST['display'] : null;
    $id = isset($_REQUEST['id']) ? $_REQUEST['id'] : null;
    if ($display == 'ivr' && $action == 'delete') {
        queues_ivr_delete_event($id);
    }
}
<?php

if (!defined('FREEPBX_IS_AUTH')) {
    die('No direct script access allowed');
}
sql('DROP TABLE IF EXISTS ivr_details');
sql('DROP TABLE IF EXISTS ivr_entries');
if (function_exists('queues_ivr_delete_event')) {
    queues_ivr_delete_event();
}