chore: no longer used net.DefaultResolver when dns section is disabled, now is equally only "system://"

component/dialer/resolver.go

@@ -1,29 +0,0 @@
-package dialer
-
-import (
-	"context"
-	"net"
-	"net/netip"
-)
-
-func init() {
-	// We must use this DialContext to query DNS
-	// when using net default resolver.
-	net.DefaultResolver.PreferGo = true
-	net.DefaultResolver.Dial = resolverDialContext
-}
-
-func resolverDialContext(ctx context.Context, network, address string) (net.Conn, error) {
-	d := &net.Dialer{}
-
-	interfaceName := DefaultInterface.Load()
-
-	if interfaceName != "" {
-		dstIP, err := netip.ParseAddr(address)
-		if err == nil {
-			_ = bindIfaceToDialer(interfaceName, d, network, dstIP)
-		}
-	}
-
-	return d.DialContext(ctx, network, address)
-}