diff --git a/lisp/textmodes/refill.el b/lisp/textmodes/refill.el
index 8f4f3c5a231..83bd7b7ade7 100644
--- a/lisp/textmodes/refill.el
+++ b/lisp/textmodes/refill.el
@@ -1,4 +1,4 @@
-;;; refill.el --- `auto-fill' by refilling paragraphs on changes
+;;; refill.el --- `auto-fill' by refilling paragraphs on changes  -*- lexical-binding: t -*-
 
 ;; Copyright (C) 2000-2021 Free Software Foundation, Inc.
 
@@ -83,11 +83,6 @@
 
 ;;; Code:
 
-;; Unused.
-;;; (defgroup refill nil
-;;;   "Refilling paragraphs on changes."
-;;;   :group 'fill)
-
 (defvar-local refill-ignorable-overlay nil
   "Portion of the most recently filled paragraph not needing filling.
 This is used to optimize refilling.")