mt76: mt7915: get rid of mt7915_mcu_set_fixed_rate routine

Fix the following sparse warning removing mt7915_mcu_set_fixed_rate
since it is no longer used:
warning: symbol 'mt7915_mcu_set_fixed_rate' was not declared.
Should it be static?
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7915/mcu.c

@@ -2389,53 +2389,6 @@ int mt7915_mcu_add_sta(struct mt7915_dev *dev, struct ieee80211_vif *vif,
 				     MCU_EXT_CMD(STA_REC_UPDATE), true);
 }
 
-int mt7915_mcu_set_fixed_rate(struct mt7915_dev *dev,
-			      struct ieee80211_sta *sta, u32 rate)
-{
-	struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
-	struct mt7915_vif *mvif = msta->vif;
-	struct sta_rec_ra_fixed *ra;
-	struct sk_buff *skb;
-	struct tlv *tlv;
-	int len = sizeof(struct sta_req_hdr) + sizeof(*ra);
-
-	skb = mt7915_mcu_alloc_sta_req(dev, mvif, msta, len);
-	if (IS_ERR(skb))
-		return PTR_ERR(skb);
-
-	tlv = mt7915_mcu_add_tlv(skb, STA_REC_RA_UPDATE, sizeof(*ra));
-	ra = (struct sta_rec_ra_fixed *)tlv;
-
-	if (!rate) {
-		ra->field = cpu_to_le32(RATE_PARAM_AUTO);
-		goto out;
-	}
-
-	ra->field = cpu_to_le32(RATE_PARAM_FIXED);
-	ra->phy.type = FIELD_GET(RATE_CFG_PHY_TYPE, rate);
-	ra->phy.bw = FIELD_GET(RATE_CFG_BW, rate);
-	ra->phy.nss = FIELD_GET(RATE_CFG_NSS, rate);
-	ra->phy.mcs = FIELD_GET(RATE_CFG_MCS, rate);
-	ra->phy.stbc = FIELD_GET(RATE_CFG_STBC, rate);
-
-	if (ra->phy.bw)
-		ra->phy.ldpc = 7;
-	else
-		ra->phy.ldpc = FIELD_GET(RATE_CFG_LDPC, rate) * 7;
-
-	/* HT/VHT - SGI: 1, LGI: 0; HE - SGI: 0, MGI: 1, LGI: 2 */
-	if (ra->phy.type > MT_PHY_TYPE_VHT) {
-		ra->phy.he_ltf = FIELD_GET(RATE_CFG_HE_LTF, rate) * 85;
-		ra->phy.sgi = FIELD_GET(RATE_CFG_GI, rate) * 85;
-	} else {
-		ra->phy.sgi = FIELD_GET(RATE_CFG_GI, rate) * 15;
-	}
-
-out:
-	return mt76_mcu_skb_send_msg(&dev->mt76, skb,
-				     MCU_EXT_CMD(STA_REC_UPDATE), true);
-}
-
 int mt7915_mcu_add_dev_info(struct mt7915_phy *phy,
 			    struct ieee80211_vif *vif, bool enable)
 {