Revert "rnbd-clt: fix refcount underflow in device unmap path"

This reverts commit ec19ed2b3e.

This commit relies on changes queued for 7.0, and isn't safe in its
current form for the 6.19 release. Revert it for now for 6.19.

Link: https://lore.kernel.org/linux-block/aXhLQmRudk7cSAnT@shinmob/
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/rnbd/rnbd-clt.c

@@ -1662,6 +1662,7 @@ static void destroy_sysfs(struct rnbd_clt_dev *dev,
 			/* To avoid deadlock firstly remove itself */
 			sysfs_remove_file_self(&dev->kobj, sysfs_self);
 		kobject_del(&dev->kobj);
+		kobject_put(&dev->kobj);
 	}
 }