rtlwifi: remove superfluous condition

If sta == NULL, the changed line will not be reached.
So no need to check that sta != NULL here.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtlwifi/core.c

@@ -1135,7 +1135,7 @@ static void rtl_op_bss_info_changed(struct ieee80211_hw *hw,
 					mac->mode = WIRELESS_MODE_AC_24G;
 			}
 
-			if (vif->type == NL80211_IFTYPE_STATION && sta)
+			if (vif->type == NL80211_IFTYPE_STATION)
 				rtlpriv->cfg->ops->update_rate_tbl(hw, sta, 0);
 			rcu_read_unlock();