hostapd: remove unused variable

'base' was never used.

Fixes: 498d84fc4e ("netifd: add wireless configuration support
and port mac80211 to the new framework")

Signed-off-by: Leon M. George <leon@georgemail.eu>

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

@@ -112,7 +112,6 @@ hostapd_prepare_device_config() {
 	local config="$1"
 	local driver="$2"
 
-	local base="${config%%.conf}"
 	local base_cfg=
 
 	json_get_vars country country_ie beacon_int:100 dtim_period:2 doth require_mode legacy_rates \