How to Stop Genesis from using first attached post image if no featured image

Archive pages are showing image even if no featured image is displayed. I only want the image shown if a featured image is assigned. If no featured image, then no image display on archive / category page.

Use the following snippet of code :

add_filter( 'genesis_get_image_default_args', 'vengala_stop_auto_featured_image' );
/**
 * Stop Genesis archives from using first attached image as fallback when no featured image is set.
 *
 * @param  array $args Default image arguments.
 *
 * @return array       Amended default image arguments.
 */
function vengala_stop_auto_featured_image( $args ) {
    $args['fallback'] = false;
    return $args;
}