swarm/storage: set false, only when we get a chunk back (#19599)

swarm/network/stream/syncer.go

@@ -93,10 +93,6 @@ func (s *SwarmSyncerServer) SessionIndex() (uint64, error) {
 // are added in batchTimeout period, the batch will be returned. This function
 // will block until new chunks are received from localstore pull subscription.
 func (s *SwarmSyncerServer) SetNextBatch(from, to uint64) ([]byte, uint64, uint64, *HandoverProof, error) {
-	//TODO: maybe add unit test for intervals usage in netstore/localstore together with SwarmSyncerServer?
-	if from > 0 {
-		from--
-	}
 	batchStart := time.Now()
 	descriptors, stop := s.netStore.SubscribePull(context.Background(), s.po, from, to)
 	defer stop()