master 4344a3c 2/3: Make Emacs 20 compat code in derived.el obsolete

[Stefan Kangas]

branch: master
commit 4344a3cfb7a293ed17a684a2a11eb6b59b02cb2a
Author: Stefan Kangas <stefankangas@gmail.com>
Commit: Stefan Kangas <stefankangas@gmail.com>

    Make Emacs 20 compat code in derived.el obsolete
    
    * lisp/emacs-lisp/derived.el (derived-mode-setup-function-name):
    Declare obsolete.  This was for compatibility with Emacs 20 or older.
---
 lisp/emacs-lisp/derived.el | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lisp/emacs-lisp/derived.el b/lisp/emacs-lisp/derived.el
index 3eafad1..6a11f1c 100644
--- a/lisp/emacs-lisp/derived.el
+++ b/lisp/emacs-lisp/derived.el
@@ -364,6 +364,7 @@ which more-or-less shadow%s %s's corresponding table%s."
 
 (defsubst derived-mode-setup-function-name (mode)
   "Construct a setup-function name based on a MODE name."
+  (declare (obsolete nil "28.1"))
   (intern (concat (symbol-name mode) "-setup")))