base-files: remove non-working filter option for wifi detect

This patch removes the non-working wifi driver filter for
the wifi detection script.

I figured that rather than replacing ${2:-$DRIVERS} with
${1:-$DRIVERS}, it would be better to remove it. Nobody
needed it in the previous years.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

package/base-files/files/sbin/wifi

@@ -146,7 +146,7 @@ wifi_reload() {
 }
 
 wifi_detect() {
-	for driver in ${2:-$DRIVERS}; do (
+	for driver in $DRIVERS; do (
 		if eval "type detect_$driver" 2>/dev/null >/dev/null; then
 			eval "detect_$driver" || echo "$driver: Detect failed" >&2
 		else
@@ -227,7 +227,7 @@ scan_wifi
 
 case "$1" in
 	down) wifi_updown "disable" "$2";;
-	detect) wifi_detect "$2";;
+	detect) wifi_detect ;;
 	status) ubus_wifi_cmd "status" "$2";;
 	reload) wifi_reload "$2";;
 	reload_legacy) wifi_reload_legacy "$2";;