paride/pd: remove ->revalidate_disk

->revalidate_disk is only called during add_disk for pd, but at that
point the driver has already set the capacity to the one returned from
Identify a little earlier, so this additional update is entirely
superflous.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210308074550.422714-2-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/paride/pd.c

@@ -859,16 +859,6 @@ static unsigned int pd_check_events(struct gendisk *p, unsigned int clearing)
 	return r ? DISK_EVENT_MEDIA_CHANGE : 0;
 }
 
-static int pd_revalidate(struct gendisk *p)
-{
-	struct pd_unit *disk = p->private_data;
-	if (pd_special_command(disk, pd_identify) == 0)
-		set_capacity(p, disk->capacity);
-	else
-		set_capacity(p, 0);
-	return 0;
-}
-
 static const struct block_device_operations pd_fops = {
 	.owner		= THIS_MODULE,
 	.open		= pd_open,
@@ -877,7 +867,6 @@ static const struct block_device_operations pd_fops = {
 	.compat_ioctl	= pd_ioctl,
 	.getgeo		= pd_getgeo,
 	.check_events	= pd_check_events,
-	.revalidate_disk= pd_revalidate
 };
 
 /* probing */