mt76x0: remove unused mt76x0_wcid

We do not use mt76x0_wcid any longer.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h

@@ -112,15 +112,6 @@ struct mt76x0_dev {
 	struct mac_stats stats;
 };
 
-struct mt76x0_wcid {
-	u8 idx;
-	u8 hw_key_idx;
-
-	u16 tx_rate;
-	bool tx_rate_set;
-	u8 tx_rate_nss;
-};
-
 extern const struct ieee80211_ops mt76x0_ops;
 
 static inline bool is_mt7610e(struct mt76x0_dev *dev)