constants.el 2.2 no longer available

[Ludovic Courtès]

Hello!

The ‘constants.el’ file that ‘emacs-constants’ refers to is no longer
available:
<https://staff.fnwi.uva.nl/c.dominik/Tools/constants/constants.el>
currently provides version 2.6 (was 2.2), and
‘emacs-constants-elisp.patch’ no longer applies.

Could you look into it?

Thanks in advance.  :-)

Ludo’.