Bug#1081577: gnome-session-bin: should not depend on upower

[Jeremy Bícha]

I'll move the Depends from gnome-session-bin to gnome-shell and
gnome-control-center. Both of those try to use upower's D-Bus
interface. upower is used not only to report the device's battery
state, but also used for the Power Mode (power profiles) feature which
I believe does work on "desktop" CPUs.

Practically, this doesn't get you what you requested, but I am taking
an action in response to your request and have provided justification
for why this dependency exists.

Thank you,
Jeremy Bícha