Disable RSS – Feed

function remove_feeds() { wp_die( __( 'Feeds Disabled' ) ); }

add_action('do_feed', 'remove_feeds', 1);

add_action('do_feed_rdf', 'remove_feeds', 1);

add_action('do_feed_rss', 'remove_feeds', 1);

add_action('do_feed_rss2', 'remove_feeds', 1);

add_action('do_feed_atom', 'remove_feeds', 1);

add_action('do_feed_rss2_comments', 'remove_feeds', 1);

add_action('do_feed_atom_comments', 'remove_feeds', 1);

remove_action( 'wp_head', 'feed_links_extra', 3 );

remove_action( 'wp_head', 'feed_links', 2 );