Drop python2 support from the CI

Since everyone seems to be doing it?

enabled an automatic merge when the pipeline for 7c35b26c succeeds

Yep, thanks!

Is this also supposed to remove usages of six and all those from __future__?

And by this I mean the general drive to stop supporting python2.

This makes it OK to start getting rid of those things, but I feel that doing that all at once would likely be a tall order. Plus somebody is likely to come up with a tool like modernize, just to remove all that gunk.

merged

mentioned in commit 473f8ccb