cfg80211: remove ieee80211_get_he_sta_cap()

This function turned out to be too easy to misuse since it
doesn't consider the interface type. Remove it now that we
no longer use it in mac80211.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210618133832.8c9c72f914b0.I68e9c0626dc77a0f67f238a05ae16a0b77b09895@changeidSigned-off-by: NJohannes Berg <johannes.berg@intel.com>

include/net/cfg80211.h

@@ -534,18 +534,6 @@ ieee80211_get_he_iftype_cap(const struct ieee80211_supported_band *sband,
 	return NULL;
 }
 
-/**
- * ieee80211_get_he_sta_cap - return HE capabilities for an sband's STA
- * @sband: the sband to search for the STA on
- *
- * Return: pointer to the struct ieee80211_sta_he_cap, or NULL is none found
- */
-static inline const struct ieee80211_sta_he_cap *
-ieee80211_get_he_sta_cap(const struct ieee80211_supported_band *sband)
-{
-	return ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_STATION);
-}
-
 /**
  * ieee80211_get_he_6ghz_capa - return HE 6 GHz capabilities
  * @sband: the sband to search for the STA on