You can user another small script, without adding any plugin. There is a post here: http://www.barattalo.it/2015/09/08/wordpress-remove-archive-pages/here and the code to add in the index.php of your theme is this:
if(is_archive()) {
// force 404
$wp_query->set_404();
status_header( 404 );
nocache_headers();
include("404.php");
die;
}
Hope you find it useful.