vmbus: drop unused ring_buffer_info elements

The elements ring_data_start_offset and priv_write_index
are not used.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/hyperv.h

@@ -124,8 +124,6 @@ struct hv_ring_buffer_info {
 	spinlock_t ring_lock;
 
 	u32 ring_datasize;		/* < ring_size */
-	u32 ring_data_startoffset;
-	u32 priv_write_index;
 	u32 priv_read_index;
 	u32 cached_read_index;
 };