[FAB-13808] Address code review comments for FAB-13363

This change set addresses code review comments for FAB-13363.

Namely:

- Deletion of the redundant logger instance in the server main.go

Change-Id: I0ee0db21894a352c7d1679efc27524162723a895
Signed-off-by: yacovm <yacovm@il.ibm.com>

Author: yacovm

orderer/common/server/main.go

@@ -102,8 +102,6 @@ func Start(cmd string, conf *localconfig.TopLevel) {
 	clusterClientConfig := initializeClusterClientConfig(conf)
 	clusterDialer.SetConfig(clusterClientConfig)
 
-	logger := flogging.MustGetLogger("orderer.common.cluster")
-
 	r := createReplicator(lf, bootstrapBlock, conf, clusterClientConfig.SecOpts, signer)
 	// Only clusters that are equipped with a recent config block can replicate.
 	if clusterType && conf.General.GenesisMethod == "file" {