<?php
    // if uninstall.php is not called by WordPress, die
    if ( ! defined('WP_UNINSTALL_PLUGIN' ) ) {
        die();
    }

    if ( false != get_option( 'acfcs_delete_cities_table' ) ) {
        global $wpdb;
        $query  = $wpdb->prepare( "DROP TABLE IF EXISTS %i", $wpdb->prefix . 'cities' );
        $method = 'query';
        $wpdb->$method( $query );
    }