wifi: ath12k: Remove some dead code

ATH12K_HE_MCS_MAX = 11, so this test and the following one are the same.
Remove the one with the hard coded 11 value.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/c17edf0811156a33bae6c5cf1906d751cc87edd4.1682423828.git.christophe.jaillet@wanadoo.fr

drivers/net/wireless/ath/ath12k/dp_rx.c

@@ -1374,11 +1374,6 @@ ath12k_update_per_peer_tx_stats(struct ath12k *ar,
 	 * Firmware rate's control to be skipped for this?
 	 */
 
-	if (flags == WMI_RATE_PREAMBLE_HE && mcs > 11) {
-		ath12k_warn(ab, "Invalid HE mcs %d peer stats",  mcs);
-		return;
-	}
-
 	if (flags == WMI_RATE_PREAMBLE_HE && mcs > ATH12K_HE_MCS_MAX) {
 		ath12k_warn(ab, "Invalid HE mcs %d peer stats",  mcs);
 		return;