If you’re using the old markup (epik 1.2) then you would use the XHTML code. Example –
//* Remove the post meta function
remove_action( 'genesis_after_post_content', 'genesis_post_meta' );<!--formatted-->
You would place this in your functions.php file. You could also use the Simple edits plugin – http://wordpress.org/extend/plugins/genesis-simple-edits/ to add it as well…..thats what they recommend for beginners.