[media] g2d: remove unused var

drivers/media/platform/s5p-g2d/g2d.c: In function 'job_abort':
drivers/media/platform/s5p-g2d/g2d.c:493:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
  int ret;
      ^

The job_abort function returns void. No sense to get the
returned argument, if this won't be used.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/platform/s5p-g2d/g2d.c

@@ -490,12 +490,11 @@ static void job_abort(void *prv)
 {
 	struct g2d_ctx *ctx = prv;
 	struct g2d_dev *dev = ctx->dev;
-	int ret;
 
 	if (dev->curr == NULL) /* No job currently running */
 		return;
 
-	ret = wait_event_timeout(dev->irq_queue,
+	wait_event_timeout(dev->irq_queue,
 			   dev->curr == NULL,
 			   msecs_to_jiffies(G2D_TIMEOUT));
 }