les: remove delayed les server starting

eth/backend.go

@@ -105,7 +105,6 @@ type Config struct {
 
 type LesServer interface {
 	Start(srvr *p2p.Server)
-	Synced()
 	Stop()
 	Protocols() []p2p.Protocol
 }

eth/handler.go

@@ -173,7 +173,7 @@ func NewProtocolManager(config *params.ChainConfig, fastSync bool, networkId int
 		return blockchain.CurrentBlock().NumberU64()
 	}
 	inserter := func(blocks types.Blocks) (int, error) {
-		manager.setSynced() // Mark initial sync done on any fetcher import
+		atomic.StoreUint32(&manager.synced, 1) // Mark initial sync done on any fetcher import
 		return manager.insertChain(blocks)
 	}
 	manager.fetcher = fetcher.New(blockchain.GetBlockByHash, validator, manager.BroadcastBlock, heighter, inserter, manager.removePeer)

eth/sync.go

@@ -181,7 +181,7 @@ func (pm *ProtocolManager) synchronise(peer *peer) {
 	if err := pm.downloader.Synchronise(peer.id, pHead, pTd, mode); err != nil {
 		return
 	}
-	pm.setSynced() // Mark initial sync done
+	atomic.StoreUint32(&pm.synced, 1) // Mark initial sync done
 
 	// If fast sync was enabled, and we synced up, disable it
 	if atomic.LoadUint32(&pm.fastSync) == 1 {
@@ -192,10 +192,3 @@ func (pm *ProtocolManager) synchronise(peer *peer) {
 		}
 	}
 }
-
-// setSynced sets the synced flag and notifies the light server if present
-func (pm *ProtocolManager) setSynced() {
-	if atomic.SwapUint32(&pm.synced, 1) == 0 && pm.lesServer != nil {
-		pm.lesServer.Synced()
-	}
-}