[FAB-7519] Remove broadcast handler from peer

Peer reuses the AtomicBroadcast service to be used for events service,
while the only API in use is Deliver and Broadcast is not implemented.
However broadcast handler being initialized and not used, this commit
simply removes the initialization of not used part.

Change-Id: Ia367c0d9a2724f0d3b981db3e20e426938e4317f
Signed-off-by: Artem Barger <bartem@il.ibm.com>

Author: C0rWin

core/peer/atomicbroadcast.go

@@ -22,10 +22,9 @@ import (
 	"github.com/hyperledger/fabric/common/deliver"
 	"github.com/hyperledger/fabric/common/flogging"
 	"github.com/hyperledger/fabric/common/policies"
-	"github.com/hyperledger/fabric/orderer/common/broadcast"
 	"github.com/hyperledger/fabric/protos/common"
 	ab "github.com/hyperledger/fabric/protos/orderer"
-	logging "github.com/op/go-logging"
+	"github.com/op/go-logging"
 )
 
 const pkgLogID = "common/peer"
@@ -37,7 +36,6 @@ func init() {
 }
 
 type server struct {
-	bh broadcast.Handler
 	dh deliver.Handler
 }
 
@@ -65,7 +63,6 @@ func (s *server) Deliver(srv ab.AtomicBroadcast_DeliverServer) error {
 func NewAtomicBroadcastServer(timeWindow time.Duration, mutualTLS bool) ab.AtomicBroadcastServer {
 	s := &server{
 		dh: deliver.NewHandlerImpl(DeliverSupportManager{}, policies.ChannelReaders, timeWindow, mutualTLS),
-		bh: broadcast.NewHandlerImpl(nil),
 	}
 	return s
 }