Release 1.2.1: Remove 31 Python 2 packages

[zimoun]

Hi,

Using “guix weather --display-missing” at commit 6bed29b, I have
identified these 31 Python 2 packages to remove:

--8<---------------cut here---------------start------------->8---
python2-arrow
python2-cairocffi
python2-cairocffi
python2-dulwich
python2-fido2
python2-flask
python2-flask-babel
python2-flask-htmlmin
python2-flask-login
python2-flask-multistatic
python2-flask-wtf
python2-furl
python2-graphql-core
python2-httpbin
python2-ipykernel
python2-ipyparallel
python2-ipython
python2-ipython-cluster-helper
python2-ipywidgets
python2-jupyter-console
python2-mpd2
python2-mutagen
python2-nbxmpp
python2-pyfakefs
python2-rq
python2-sh
python2-stem
python2-tables
python2-utils
python2-widgetsnbextension
python2-wsgiproxy2
python2-yubikey-manager
--8<---------------cut here---------------end--------------->8---


They do not build.  The Python 3 variant builds or does not exist.

Last, “guix refresh -l <pkg>” is fine.


Any objection?


Cheers,
simon