staging: unisys: Remove unused cruft

Removing stuff that isn't being used.  Another prepartion patch to
allow us to use visor_device everywhere without the baggage of
bus/dev_info.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>