Variable 'rc' hasn't been checked since the driver's inception
in 2013.  If it hasn't caused any issues since then, it's unlikely
to in the future.  Let's take it out for now.

Fixes the following W=1 kernel build warning(s):

 drivers/misc/genwqe/card_base.c: In function 
‘genwqe_health_check_stop’:

/home/lee/projects/linux/kernel/drivers/misc/genwqe/card_base.c:1046:6:
warning: variable ‘rc’ set but not used
[-Wunused-but-set-variable]
 1046 | int rc;
 | ^~

Cc: Michael Jung <redacted>
Cc: Michael Ruettger <redacted>
Cc: Frank Haverkamp <haver@linux.ibm.com>
Cc: Joerg-Stephan Vogt <redacted>
Signed-off-by: Lee Jones <redacted>
---
 drivers/misc/genwqe/card_base.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/misc/genwqe/card_base.c 

b/drivers/misc/genwqe/card_base.c
index 1dc6c7c5cbce9..bceebf49de2d5 100644

--- a/drivers/misc/genwqe/card_base.c
+++ b/drivers/misc/genwqe/card_base.c

@@ -1043,12 +1043,10 @@ static int genwqe_health_thread_running(struct

genwqe_dev *cd)

 static int genwqe_health_check_stop(struct genwqe_dev *cd)
 {
-	int rc;
-
 	if (!genwqe_health_thread_running(cd))
 		return -EIO;

-	rc = kthread_stop(cd->health_thread);
+	kthread_stop(cd->health_thread);
 	cd->health_thread = NULL;
 	return 0;
 }