I found an answer to this from StudioPress.
This code removes the “author box” (genesis_post_info) from the whole site:
remove_action( 'genesis_entry_header', 'genesis_post_info', 12 );
You could always add a condition (this would go in your functions.php file):
/** Remove Post Info */
if (is_category('Category Name'))
remove_action( 'genesis_entry_header', 'genesis_post_info', 12 );
