Doc: obsolete reference to MSI packages

[partev]

https://docs.python.org/3.13/using/windows.html page refers to "MSI packages" in the following sentence:
To make Python available, the CPython team has compiled Windows installers (MSI packages) with every release for many years.

However, MSI packages have been replaced regular Windows installer since python-3.5; for example see here:
https://docs.python.org/3.13/whatsnew/3.5.html
Windows improvements:

• A new installer for Windows has replaced the old MSI.

because of this the reference for MSI packages should be removed from documentation here: https://docs.python.org/3.13/using/windows.html

Linked PRs

• gh-115872: Doc: remove obsolete reference to MSI packages #115873
• [3.12] gh-115872: Doc: remove obsolete reference to MSI packages (GH-115873) #115876
• [3.11] gh-115872: Doc: remove obsolete reference to MSI packages (GH-115873) #115877

[terryjreedy]

I grepped Doc/*.rst and there are no other MSI references. (There are some .*MSI.* words line MSIE (explorer).) So unless there are MSIs hiding in comments or docstrings, which I think is pretty unlikely and not so visible to user if there are, this issue is truly done.