Remove Primary Navigation and Header Right widget area from homepage.

functions.php

<?php
//* Do NOT include the opening php tag

add_action( 'genesis_before_header', 'sk_home_specific' );
/**
 * Remove Primary Navigation and Header Right widget area from homepage.
 *
 * @author Sridhar Katakam
 * @link   http://sridharkatakam.com/
 */
function sk_home_specific() {
	if ( is_home() ) {
		remove_action( 'genesis_after_header', 'genesis_do_nav' );
		unregister_sidebar( 'header-right' );
	}
}