core: removed unused addPeerTimer code

Resolves #1279

src/core/core.go

@@ -8,7 +8,6 @@ import (
 	"io"
 	"net"
 	"net/url"
-	"time"
 
 	iwe "github.com/Arceliar/ironwood/encrypted"
 	iwn "github.com/Arceliar/ironwood/network"
@@ -35,7 +34,6 @@ type Core struct {
 	links        links
 	proto        protoHandler
 	log          Logger
-	addPeerTimer *time.Timer
 	config       struct {
 		tls *tls.Config // immutable after startup
 		//_peers             map[Peer]*linkInfo         // configurable after startup
@@ -160,10 +158,6 @@ func (c *Core) _close() error {
 	c.cancel()
 	c.links.shutdown()
 	err := c.PacketConn.Close()
-	if c.addPeerTimer != nil {
-		c.addPeerTimer.Stop()
-		c.addPeerTimer = nil
-	}
 	return err
 }