Remove the object_added/object_removed events
Remove the object_added/object_removed events

These were only provided in the udisks2 wrapper for internal use. The
object_removed was not even implemented as far as I can see.

khardix/udiskie,pstray/udiskie,coldfix/udiskie,coldfix/udiskie,mathstuf/udiskie,pstray/udiskie