[Debian-med-packaging] python-pbcore is marked for autoremoval from testing

[Debian testing autoremoval watch]

python-pbcore 1.7.1+git20200129.c55621e+dfsg-1 is marked for autoremoval from testing on 2020-03-26

It is affected by these RC bugs:
950336: python-pbcore: build-depends on python3-pyxb which has been requested to be removed