Use the following code in the child or genesis functions.php to remove the entry_footer:
//* Remove the entry footer markup (requires HTML5 theme support)
remove_action( 'genesis_entry_footer', 'genesis_entry_footer_markup_open', 5 );
remove_action( 'genesis_entry_footer', 'genesis_entry_footer_markup_close', 15 );
remove_action( 'genesis_entry_footer', 'genesis_post_meta' );