iwlwifi: remove unused members of iwl_ht_info

Some members of iwl_ht_info are unused, and one of
them is write-only, so we can remove these three:
max_amsdu_size, ampdu_factor and mpdu_density.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Daniel C Halperin <daniel.c.halperin@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-core.c

@@ -2397,8 +2397,6 @@ static void iwl_ht_conf(struct iwl_priv *priv,
 		iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
 
 	iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
-	iwl_conf->max_amsdu_size =
-		!!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
 
 	iwl_conf->supported_chan_width =
 		!!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);

drivers/net/wireless/iwlwifi/iwl-dev.h

@@ -509,9 +509,6 @@ struct iwl_ht_info {
 	u8 sm_ps;
 	u8 is_green_field;
 	u8 sgf;			/* HT_SHORT_GI_* short guard interval */
-	u8 max_amsdu_size;
-	u8 ampdu_factor;
-	u8 mpdu_density;
 	struct ieee80211_mcs_info mcs;
 	/* BSS related data */
 	u8 extension_chan_offset;