Revert "ath9k_hw: implement temperature compensation support for AR9003+"

This reverts commit 171f6402e4 ("ath9k_hw: implement temperature compensation
support for AR9003+"). Some users report that this commit causes a regression
in performance under some conditions.

Fixes: 171f6402e4 ("ath9k_hw: implement temperature compensation support for AR9003+")
Cc: <stable@vger.kernel.org> # 4.8
Signed-off-by: Felix Fietkau <nbd@nbd.name>
[kvalo@qca.qualcomm.com: improve commit log]
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath9k/hw.h

@@ -830,7 +830,6 @@ struct ath_hw {
 	/* Calibration */
 	u32 supp_cals;
 	struct ath9k_cal_list iq_caldata;
-	struct ath9k_cal_list temp_caldata;
 	struct ath9k_cal_list adcgain_caldata;
 	struct ath9k_cal_list adcdc_caldata;
 	struct ath9k_cal_list *cal_list;