mac80211: remove last_beacon/ave_beacon debugfs files

These file aren't really useful:
 - if per beacon data is required then you need to use
   radiotap or similar anyway, debugfs won't help much
 - average beacon signal is reported in station info in
   nl80211 and can be looked up with iw

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index f1580e9..37ea30e 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -114,14 +114,6 @@
 	return scnprintf(buf, buflen, "%pM\n", sdata->field);		\
 }
 
-#define IEEE80211_IF_FMT_DEC_DIV_16(name, field)			\
-static ssize_t ieee80211_if_fmt_##name(					\
-	const struct ieee80211_sub_if_data *sdata,			\
-	char *buf, int buflen)						\
-{									\
-	return scnprintf(buf, buflen, "%d\n", sdata->field / 16);	\
-}
-
 #define IEEE80211_IF_FMT_JIFFIES_TO_MS(name, field)			\
 static ssize_t ieee80211_if_fmt_##name(					\
 	const struct ieee80211_sub_if_data *sdata,			\
@@ -247,8 +239,6 @@
 /* STA attributes */
 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
-IEEE80211_IF_FILE(last_beacon, u.mgd.last_beacon_signal, DEC);
-IEEE80211_IF_FILE(ave_beacon, u.mgd.ave_beacon_signal, DEC_DIV_16);
 IEEE80211_IF_FILE(beacon_timeout, u.mgd.beacon_timeout, JIFFIES_TO_MS);
 
 static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
@@ -634,8 +624,6 @@
 {
 	DEBUGFS_ADD(bssid);
 	DEBUGFS_ADD(aid);
-	DEBUGFS_ADD(last_beacon);
-	DEBUGFS_ADD(ave_beacon);
 	DEBUGFS_ADD(beacon_timeout);
 	DEBUGFS_ADD_MODE(smps, 0600);
 	DEBUGFS_ADD_MODE(tkip_mic_test, 0200);
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 65f4faa..9482f32 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -490,9 +490,6 @@
 
 	s16 p2p_noa_index;
 
-	/* Signal strength from the last Beacon frame in the current BSS. */
-	int last_beacon_signal;
-
 	/*
 	 * Weighted average of the signal strength from Beacon frames in the
 	 * current BSS. This is in units of 1/16 of the signal unit to maintain
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 6daadf2..ce01cd3 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -3364,7 +3364,6 @@
 	bssid = ifmgd->associated->bssid;
 
 	/* Track average RSSI from the Beacon frames of the current AP */
-	ifmgd->last_beacon_signal = rx_status->signal;
 	if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
 		ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
 		ifmgd->ave_beacon_signal = rx_status->signal * 16;