Comment 1 for bug 1357713

First of all, I do not think that being unbound is a bug in these unbound packages (upstart and ifupdown).
The possible bug is in the package, which should depend on them.

However, one should not remove upstart from the setup, unless certain installations and settings is made.
First of all, for the removal of upstart, one must install package systemd-sysv.
This is to change the setup from using upstart to use sysv instead.
Systemd-sysv will force the removal of upstart and upstart-bin.
Also these packages must be removed: cgmanager, libcgmanager0, systemd-shim, libjson0.
In addition one should add "init=/lib/systemd/systemd" to the kernel line.

However, this is all experimental now, I assume, and that is why Canonical hasn't officially proceeded to do this.