hostapd: remove unused local var declaration

Signed-off-by: Leon M. George <[email protected]>

package/network/services/hostapd/files/hostapd.sh

@@ -769,8 +769,6 @@ wpa_supplicant_add_network() {
 		append network_data "mcast_rate=$mc_rate" "$N$T"
 	}
 
-	local ht_str
-
 	cat >> "$_config" <<EOF
 network={
 	$scan_ssid