Disable theme and plugin update notification WordPress

function remove_core_updates(){
        global $wp_version;return(object) array('last_checked'=> time(),'version_checked'=> $wp_version,);
    }
    add_filter('pre_site_transient_update_core','remove_core_updates');
    add_filter('pre_site_transient_update_plugins','remove_core_updates');
    add_filter('pre_site_transient_update_themes','remove_core_updates');