Remove DNS Prefetch in WordPress

Making WordPress faster is an ongoing process. One small step with minimal impact is removing DNS prefetching for the following addresses (if you want to remove them):

<link rel='dns-prefetch' href='//s.w.org'/>
<link rel='dns-prefetch' href='//fonts.googleapis.com'/>

In the page source it looks like this:

To remove these, add the following code to your theme’s functions.php file:

function remove_dns_prefetch () {
    remove_action( 'wp_head', 'wp_resource_hints', 2, 99 );
}
add_action( 'init', 'remove_dns_prefetch' );

If you are not familiar, here is a post explaining what DNS is.