For those who do not want the automatically generated shortlink generated by WordPress, here is a plugin that will stop the link from being created. Add the below code to a .php file and upload it to your plugin directory. Once uploaded, activate the plugin from your dashboard and the shortlink will not appear for your site.
<?php /* Plugin Name: WP Shortlink Remover Plugin URI: https://www.dalesandro.net/ Description: WordPress plugin to remove shortlink from header. Author: DALESANDRO.NET Version: 1.0 Author URI: https://www.dalesandro.net/ */ remove_action('wp_head', 'wp_shortlink_wp_head'); ?>