Code review comment for lp://qastaging/~aacid/indicator-bluetooth/fix_autostart

As I said on IRC, "OnlyShowIn: unity" is wrong. Indicators should *not* be started in Unity via xdg autostart, as they are started via upstart.

Xubuntu and GNOME Flashback are using upstart jobs as well, so maybe we don't need this desktop file at all:

https://launchpad.net/ubuntu/+source/xfce4-indicator-plugin/2.3.2-0ubuntu2
https://launchpad.net/ubuntu/+source/gnome-panel/1:3.8.0-1ubuntu9