[docs] [issue23156] Remove tix install information in tkinter tix chapter of doc

[Terry J. Reedy]

Change by Terry J. Reedy <tjreedy at udel.edu>:


----------
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
title: Update tix install information in tkinter tix chapter of doc -> Remove tix install information in tkinter tix chapter of doc
versions: +Python 3.7

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue23156>
_______________________________________