remove unneeded code

Author: wwqgtxx

core/src/main/golang/native/app/dns.go

@@ -7,14 +7,6 @@ import (
 )
 
 func NotifyDnsChanged(dnsList string) {
-	dL := strings.Split(dnsList, ",")
-
-	ns := make([]dns.NameServer, 0, len(dnsList))
-	for _, d := range dL {
-		ns = append(ns, dns.NameServer{Addr: d})
-	}
-
-	dns.UpdateSystemDNS(dL)
+	dns.UpdateSystemDNS(strings.Split(dnsList, ","))
 	dns.FlushCacheWithDefaultResolver()
 }
-