Dropping Python 2 support from Breezy

[Martin (gzlist)]

On Thu, 16 Jan 2020 at 00:38, Jelmer Vernooij <jelmer at jelmer.uk> wrote:
>
> I'd like to consider dropping support for Python 2 from the next major
> release, Breezy 3.1.

I think this makes sense. Simultaneous support for Python 2 and 3
served the purpose keeping the test suite passing during the porting
process, there's not a good reason to keep maintaining 2.7 support
going forward.

Martin