iwlwifi: sta_id cannot be invalid in rs_initialize_lq

The only caller of this is iwl_rs_rate_init
which is only called with a valid sta_id.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>

drivers/net/wireless/iwlwifi/iwl-agn-rs.c

@@ -2377,10 +2377,6 @@ static void rs_initialize_lq(struct iwl_priv *priv,
 
 	i = lq_sta->last_txrate_idx;
 
-	if ((lq_sta->lq.sta_id == 0xff) &&
-	    (priv->iw_mode == NL80211_IFTYPE_ADHOC))
-		goto out;
-
 	valid_tx_ant = priv->hw_params.valid_tx_ant;
 
 	if (!lq_sta->search_better_tbl)