[VOL-3801] remove unused KV consul code in voltha-lib-go

Change-Id: Iedfd7c24440692d74c8f463d80f3ad259cbf2e6d
diff --git a/pkg/ponresourcemanager/ponresourcemanager.go b/pkg/ponresourcemanager/ponresourcemanager.go
index 408936b..0e1ae8f 100755
--- a/pkg/ponresourcemanager/ponresourcemanager.go
+++ b/pkg/ponresourcemanager/ponresourcemanager.go
@@ -140,7 +140,7 @@
 	Technology       string
 	DeviceType       string
 	DeviceID         string
-	Backend          string // ETCD, or consul
+	Backend          string // ETCD only currently
 	Address          string // address of the KV store
 	OLTModel         string
 	KVStore          *db.Backend
@@ -159,8 +159,6 @@
 func newKVClient(ctx context.Context, storeType string, address string, timeout time.Duration) (kvstore.Client, error) {
 	logger.Infow(ctx, "kv-store-type", log.Fields{"store": storeType})
 	switch storeType {
-	case "consul":
-		return kvstore.NewConsulClient(ctx, address, timeout)
 	case "etcd":
 		return kvstore.NewEtcdClient(ctx, address, timeout, log.WarnLevel)
 	}