VOL-2153 remove flow_utils.go from voltha-go

Change-Id: I81bdc9ed78e6a6b00a176f9c8366ff56fb7777b0
diff --git a/go.mod b/go.mod
index 6595e62..514830e 100644
--- a/go.mod
+++ b/go.mod
@@ -4,12 +4,11 @@
 
 require (
 	github.com/bclicn/color v0.0.0-20180711051946-108f2023dc84
-	github.com/cevaris/ordered_map v0.0.0-20190319150403-3adeae072e73
 	github.com/gogo/protobuf v1.3.0
 	github.com/golang/protobuf v1.3.2
 	github.com/google/uuid v1.1.1
 	github.com/gyuho/goraph v0.0.0-20160328020532-d460590d53a9
-	github.com/opencord/voltha-lib-go v0.0.0-20191023185531-80258b36a64b
+	github.com/opencord/voltha-lib-go v0.0.0-20191024175357-456b893dc42c
 	github.com/opencord/voltha-protos v1.0.3
 	github.com/stretchr/testify v1.4.0
 	google.golang.org/grpc v1.24.0