Remove S.W.org DNS prefetch from Wordpress

Making Wordpress faster is an ongoing experiment. There's a few more things I've discovered which can be removed for small (albeit in this case, VERY small, speed gain). DNS prefetching Google fonts and S.W.org which pulls files from the WP repository.

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

It's as easy as that. We use it here and here.