staging: unisys: remove some dead code

queue_delayed_work() returns bool, not negative error codes.  It returns
false if the work has already been queued or true otherwise.  Since
we don't care about that, we can just remove the test.

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