Remove these tags from the header : rsd, wlwmanifest, wp_shortlink, feed_links, feed_links_extra, rest_output_link, discovery_links, rest_output, wp_generator. Also remove Wordpress version from Javascript and CSS.
Allows administrators to globally disable XML-RPC, new emoji functionality in WordPress 4.2, wp generator, wlwmanifest, RSD EditURI and rss/feeds on their site.