Dear Maintainers,

python3-tz is a dummy empty transitional package that does nothing
but pulling in python3-pytz.

We are trying to get rid of old transitional packages.

Please tweak d/control accordingly.

Even better: let dh-python handle this dependency automatically,
just remove python3-tz and dh-python will compute the correct
python3-pytz dependency by itself.

Greetings

Alexandre