staging: unisys: remove unused vmcall functions from uisutils.h

Delete the issue_vmcall_measurement_do_nothing() and
issue_vmcall_fatal() functions, because they are unused.

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