Bug#932680: python-imageio: Don't depend on python-gdal

[Bas Couwenberg]

Source: python-imageio
Version: 2.4.1-2
Severity: important
User: debian-gis at lists.debian.org
Usertags: python-gdal

Dear Maintainer,

The python-gdal package is going to be removed due to the
Python 2 EOL.

Your package should stop (build) depending on python-gdal.

Kind Regards,

Bas