Comment # 6 on bug 1192287 from Alberto Planas Dominguez

(In reply to Lukas Ocilka from comment #4)
> It's this PR: https://github.com/yast/yast-installation/pull/287
> 
> This is definitely wanted functionality - snapshot after all is installed
> and configured. It's there for ages.
> 
> Alberto, why exactly you would like to remove such snapshot now?

In MicroOS / SLE Micro order the snapshots is in a different way. This PR is
for the snapper model that we have in TW / SLE, where the current snapshot is
changed during the upgrade, was we make a pre and post snapshot to have a place
to do the rollback.

In MicroOS we live in the last snapshot, that is the default one and a `t-u
dup` will create a new snapshot based on the active one, that will become the
new active for the next reboot.

This snapshot#2 in MicroOS / SLE Micro should not be present IMHO, as is a
remanent of the old model.

You can see that yourself: install a new MicroOS from scratch and the first
boot will be over the snaphot#1 (default and active). Snapshot#2 is present and
unlabeled (so broken). Do a "t-u pkg in" and this will create snapshot#3 based
on snapshot#1, and if all goes OK #3 is the new default one that will be active
after the reboot.

In this operation #2 was never used, never default and never active. But is
still unlabeled and can be a candidate for a rollback (t-u rollback), that can
be problematic.