Dmitry Tantsur 979bcae918 Remove support for Ubuntu Xenial and Debian Stretch
They're broken already, no point in officially supporting them.
Bring support back would require supporting Python 3.5 and other
old packages.

Change-Id: I8012f0cdf2430723379367eb6ab49c3fc0b3d32a
2020-06-03 10:12:07 +02:00
..