hv_netvsc: drop unused macros

	(sizeof(msg) + (sizeof(struct rndis_message) -	\

	 sizeof(union rndis_message_container)))

/* get pointer to info buffer with message pointer */

#define MESSAGE_TO_INFO_BUFFER(msg)				\

	(((unsigned char *)(msg)) + msg->info_buf_offset)

/* get pointer to status buffer with message pointer */

#define MESSAGE_TO_STATUS_BUFFER(msg)			\

	(((unsigned char *)(msg)) + msg->status_buf_offset)

/* get pointer to OOBD buffer with message pointer */

#define MESSAGE_TO_OOBD_BUFFER(msg)				\

	(((unsigned char *)(msg)) + msg->oob_data_offset)

/* get pointer to data buffer with message pointer */

#define MESSAGE_TO_DATA_BUFFER(msg)				\

	(((unsigned char *)(msg)) + msg->per_pkt_info_offset)

/* get pointer to contained message from NDIS_MESSAGE pointer */

#define RNDIS_MESSAGE_PTR_TO_MESSAGE_PTR(rndis_msg)		\

	((void *) &rndis_msg->msg)

/* get pointer to contained message from NDIS_MESSAGE pointer */

#define RNDIS_MESSAGE_RAW_PTR_TO_MESSAGE_PTR(rndis_msg)	\

	((void *) rndis_msg)

#define RNDIS_HEADER_SIZE	(sizeof(struct rndis_message) - \

				 sizeof(union rndis_message_container))