[media] dvb_frontend: fix compile warning

Andreas Oberritter <obi@linuxtv.org> has looked at this and agreed that it is
safe to remove the 'timeout' variable.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/dvb-core/dvb_frontend.c

@@ -537,7 +537,6 @@ static int dvb_frontend_thread(void *data)
 {
 	struct dvb_frontend *fe = data;
 	struct dvb_frontend_private *fepriv = fe->frontend_priv;
-	unsigned long timeout;
 	fe_status_t s;
 	enum dvbfe_algo algo;
 
@@ -558,7 +557,7 @@ static int dvb_frontend_thread(void *data)
 	while (1) {
 		up(&fepriv->sem);	    /* is locked when we enter the thread... */
 restart:
-		timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
+		wait_event_interruptible_timeout(fepriv->wait_queue,
 			dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 				|| freezing(current),
 			fepriv->delay);