Remove Site Header Right Widget in Genesis

//* Remove the header right widget area
	unregister_sidebar( 'header-right' );

//* Remove the header right widget area
	unregister_sidebar( 'header-right' );
	remove_action( 'genesis_header', 'genesis_do_header' );

Remove Site Header Right Widget conditionally.

//* Remove Header right Widget using conditional tag.
add_action( 'genesis_title', 'remove_header_right_widget', 9 ); // genesis_title, genesis_meta or wp_head
function remove_header_right_widget() {
    if ( ! is_front_page() ) {
        return;
    }
	//* Remove the header right widget area
	unregister_sidebar( 'header-right' );
	remove_action( 'genesis_header', 'genesis_do_header' );
}