http://wordpress.stackexchange.com/a/137278/26350

/**
 * @link http://wordpress.stackexchange.com/a/137278/26350
 */

add_action( 'admin_init', function(){

    // Current:
    $wpp_rg = get_option( 'wpp_rg' );

    // Input:
    $input = filter_input( INPUT_POST, 'wpp_rg', FILTER_SANITIZE_NUMBER_INT );

    // Update:
    if ( ! empty( $input ) )
        update_option( 'wpp_rg', $input );

    // Active:
    if ( '1' === $wpp_rg )
        remove_action( 'admin_notices', 'update_nag', 3 );

});