staging: unisys: remove unused code from controlvmchannel.h

Delete struct PciConfigHdr, struct ScsiId, struct WWID, struct
VirtDiskInfo, enum CONTROLVM_ACTION, and enum ULTRA_TOOL_ACTIONS.

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