Reply To: Removing the author and date from the Optimal Theme posts

The post info can actually be removed from the functions file (not css) by adding this code –

/** Remove the post info function */
remove_action( 'genesis_before_post_content', 'genesis_post_info' );

To customize it, add the following code, and remove the shortcodes you don’t want to use –

/** Customize the post info function */
add_filter( 'genesis_post_info', 'post_info_filter' );
function post_info_filter($post_info) {
if (!is_page()) {
$post_info = '[post_date] by [post_author_posts_link] at [post_time] [post_comments] [post_edit]';
return $post_info;
}}

For more info – http://www.studiopress.com/tutorials/customize-post-info#remove