The debian package python3-dateutil recently was changed to depend on
the debian package tzdata, and not on the python tzdata anymore. This
makes sense to avoid duplication (python-dateutil will use the system
tzdata if the python tzdata is not available).

However when trying to install debian's python-dateutil inside a venv,
the dependency on python tzdata is still in the metadata and it leads to
tzdata getting downloaded and used instead of the system variant. This
is inconsistent and can lead to problems when attempting to install into
the venv without network access.

Reproducer:

Could somebody make it so that it doesn't attempt to download tzdata in
that scenario by removing the python tzdata dependency from the python
metadata?

Best regards,
Oliver