remove_action( 'wp_head', 'feed_links_extra', 3 ); // Display the links to the extra feeds such as category feeds
    remove_action( 'wp_head', 'feed_links', 2 ); // Display the links to the general feeds: Post and Comment Feed
    remove_action( 'wp_head', 'rsd_link' ); // Display the link to the Really Simple Discovery service endpoint, EditURI link
    remove_action( 'wp_head', 'wlwmanifest_link' ); // Display the link to the Windows Live Writer manifest file.
    remove_action( 'wp_head', 'index_rel_link' ); // index link
    remove_action( 'wp_head', 'parent_post_rel_link', 10, 0 ); // prev link
    remove_action( 'wp_head', 'start_post_rel_link', 10, 0 ); // start link
    remove_action( 'wp_head', 'adjacent_posts_rel_link', 10, 0 ); // Display relational links for the posts adjacent to the current post.
    remove_action( 'wp_head', 'wp_generator' ); // Display the XHTML generator that is generated on the wp_head hook, WP version

http://darrenhuskie.com/

Remove unnecessary code from the default WordPress header.

Clean up WordPress wp_head()

header, wordpress

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