ath9k: remove the noise floor value in the ani struct

common->ani.noise_floor is now only used for a similar redundant debug
message similar to the one that was removed from ath9k_htc in an earlier
patch. Remove it from ath9k as well now.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/main.c

@@ -459,16 +459,6 @@ void ath_ani_calibrate(unsigned long data)
 						   ah->curchan,
 						   common->rx_chainmask,
 						   longcal);
-
-			if (longcal)
-				common->ani.noise_floor = ath9k_hw_getchan_noise(ah,
-								     ah->curchan);
-
-			ath_print(common, ATH_DBG_ANI,
-				  " calibrate chan %u/%x nf: %d\n",
-				  ah->curchan->channel,
-				  ah->curchan->channelFlags,
-				  common->ani.noise_floor);
 		}
 	}