[media] staging: bcm2048: Delete an unnecessary check before the function call "video_unregister_device"

The video_unregister_device() function tests whether its argument is NULL
and then returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/staging/media/bcm2048/radio-bcm2048.c

@@ -2684,9 +2684,7 @@ static int __exit bcm2048_i2c_driver_remove(struct i2c_client *client)
 		vd = bdev->videodev;
 
 		bcm2048_sysfs_unregister_properties(bdev, ARRAY_SIZE(attrs));
-
-		if (vd)
-			video_unregister_device(vd);
+		video_unregister_device(vd);
 
 		if (bdev->power_state)
 			bcm2048_set_power_state(bdev, BCM2048_POWER_OFF);