sysfs: remove unused sysfs_buffer->pos

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/sysfs/file.c

@@ -44,7 +44,6 @@ struct sysfs_open_dirent {
 
 struct sysfs_buffer {
 	size_t			count;
-	loff_t			pos;
 	char			*page;
 	const struct sysfs_ops	*ops;
 	struct mutex		mutex;