Remove unnecessary parameter validation

This is dead code since this helper function is always called with
non-NULL pointer.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/ap/ctrl_iface_ap.c

@@ -469,9 +469,6 @@ int hostapd_parse_csa_settings(const char *pos,
 {
 	char *end;
 
-	if (!settings)
-		return -1;
-
 	os_memset(settings, 0, sizeof(*settings));
 	settings->cs_count = strtol(pos, &end, 10);
 	if (pos == end) {