internal/clientinfo: remove dhcp from refresher list

dhcp lease files are watched separately using fsnotify, it does not need
to be in refresher list.

internal/clientinfo/client_info.go

@@ -95,13 +95,12 @@ func (t *Table) Init() {
 	if t.discoverDHCP() {
 		t.dhcp = &dhcp{selfIP: t.selfIP}
 		ctrld.ProxyLog.Debug().Msg("start dhcp discovery")
-		if err := t.dhcp.refresh(); err != nil {
+		if err := t.dhcp.init(); err != nil {
 			ctrld.ProxyLog.Error().Err(err).Msg("could not init DHCP discover")
 		} else {
 			t.ipResolvers = append(t.ipResolvers, t.dhcp)
 			t.macResolvers = append(t.macResolvers, t.dhcp)
 			t.hostnameResolvers = append(t.hostnameResolvers, t.dhcp)
-			t.refreshers = append(t.refreshers, t.dhcp)
 		}
 		go t.dhcp.watchChanges()
 	}

internal/clientinfo/dhcp.go

@@ -28,7 +28,7 @@ type dhcp struct {
 	selfIP  string
 }
 
-func (d *dhcp) refresh() error {
+func (d *dhcp) init() error {
 	watcher, err := fsnotify.NewWatcher()
 	if err != nil {
 		return err