Centric pro?

Centric Pro adds the Genesis archive headline/description in that top area, so it’s a custom case that the plugin cannot automatically account for. If you want to keep the theme’s output and remove what the plugin is doing, you can try this code:

add_filter( 'display_featured_image_genesis_modify_title_overlay', 'rgc_remove_from_categories' );
add_filter( 'display_featured_image_genesis_term_description', 'rgc_remove_from_categories' );
function rgc_remove_from_categories( $output ) {
	if ( is_tax() ) {
		return '';
	}
}

If you want to keep the plugin output and remove the theme’s work, then you need to look in the functions.php file for the centric_post_title function and modify that.

Hope that helps!