ath9k_htc: Remove unused macros and structures

	HTC_M_WDS	= 2

};

#define ATH9K_HTC_HDRSPACE sizeof(struct htc_frame_hdr)

#define ATH9K_HTC_AMPDU  1

#define ATH9K_HTC_NORMAL 2

#define ATH9K_HTC_BEACON 3

#define ATH9K_HTC_TX_CTSONLY      0x1

#define ATH9K_HTC_TX_RTSCTS       0x2

#define ATH9K_HTC_TX_USE_MIN_RATE 0x100

struct tx_frame_hdr {

	u8 data_type;

	void (*rx) (void *, struct sk_buff *, enum htc_endpoint_id);

};

#define HTC_TX_QUEUE_SIZE 256

struct htc_txq {

	struct sk_buff *buf[HTC_TX_QUEUE_SIZE];

	u32 txqdepth;

	u16 txbuf_cnt;

	u16 txq_head;

	u16 txq_tail;

};

struct htc_endpoint {

	u16 service_id;

	struct htc_ep_callbacks ep_callbacks;

	struct htc_txq htc_txq;

	u32 max_txqdepth;

	int max_msglen;