Bug#936265: caja-admin: Python2 removal in sid/bullseye

[Vlad Orlov]

Hi,

Upstream should be now compatible with Python 3:
https://github.com/infirit/caja-admin/commit/0af109ac79df76fbcc406d577d79f1c64d1a1fca

There was no new upstream release though, so that commit should be used as a 
patch.