<?php
if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
    exit;
}
$devthrow_upload_dir = wp_upload_dir();
$devthrow_dir = trailingslashit($devthrow_upload_dir['basedir']) . 'devthrow-migrator';
if (is_dir($devthrow_dir)) {
    require_once ABSPATH . 'wp-admin/includes/file.php';
    WP_Filesystem();
    global $wp_filesystem;
    if ($wp_filesystem) {
        $wp_filesystem->rmdir($devthrow_dir, true);
    }
}