//* Customize entry meta in entry header for all Posts that belong to a particular category
add_filter( 'genesis_post_info', 'mpp_post_info_filter' );
function mpp_post_info_filter($post_info) {
    if ( ! in_category( 'upcoming-auctions' ) ) {
            return $post_info;
    }

    $post_info = '';

    return $post_info;
}