Code to Remove rel=’shortlink’ from WordPress Header

/* Remove rel='shortlink' from HTTP Header */
remove_action( 'wp_head', 'wp_shortlink_wp_head');

Add this code to your child theme’s functions.php to remove rel=’shortlink’ from WordPress HTTP header. Shortlink in the header is an alternate way to access the same URL.

We have removed the shortlink entry in the header for this page which originally was,

<link rel=’shortlink’ href=’https://wpf.jaxn.in/?p=440‘ />

If you access the URL through page ID, which is 440 for this page, you will still be redirected to the same page, which is the default behavior of WordPress.