ath10k: sdio: remove unused struct member

irq_wq in struct ath10k_sdio is a remnant from an earlier
version of the sdio patchset.

Its use was removed as a result of Kalle's review, but somehow
the struct member survived.

It is not used and can therefore safely be removed.
Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/sdio.c

@@ -1344,8 +1344,6 @@ static void ath10k_sdio_irq_handler(struct sdio_func *func)
 
 	sdio_claim_host(ar_sdio->func);
 
-	wake_up(&ar_sdio->irq_wq);
-
 	if (ret && ret != -ECANCELED)
 		ath10k_warn(ar, "failed to process pending SDIO interrupts: %d\n",
 			    ret);
@@ -2000,8 +1998,6 @@ static int ath10k_sdio_probe(struct sdio_func *func,
 		goto err_free_bmi_buf;
 	}
 
-	init_waitqueue_head(&ar_sdio->irq_wq);
-
 	for (i = 0; i < ATH10K_SDIO_BUS_REQUEST_MAX_NUM; i++)
 		ath10k_sdio_free_bus_req(ar, &ar_sdio->bus_req[i]);
 

drivers/net/wireless/ath/ath10k/sdio.h

@@ -210,8 +210,6 @@ struct ath10k_sdio {
 	/* temporary buffer for BMI requests */
 	u8 *bmi_buf;
 
-	wait_queue_head_t irq_wq;
-
 	bool is_disabled;
 
 	struct workqueue_struct *workqueue;