[buildd-tools-devel] Some cleanup for current tip

[Jan-Marek Glogowski]

Hi

The following patches just contain cleanups for current schroot tip.

For a non-complainning package I had to revert
"sbuild::chroot_facet_session: Move deserialisation code from
chroot_facet_source" (45364d48302ab5a4f3152159955c217306146a8c), which
produced deprecation warnings for mein configured union chroots.

Regards,
Jan-Marek