VOL-2153 remove flow_utils.go from voltha-go

Change-Id: I81bdc9ed78e6a6b00a176f9c8366ff56fb7777b0
diff --git a/rw_core/flow_decomposition/flow_decomposer.go b/rw_core/flow_decomposition/flow_decomposer.go
index d28a803..ff9225c 100644
--- a/rw_core/flow_decomposition/flow_decomposer.go
+++ b/rw_core/flow_decomposition/flow_decomposer.go
@@ -20,7 +20,7 @@
 	"github.com/gogo/protobuf/proto"
 	"github.com/opencord/voltha-go/rw_core/coreIf"
 	"github.com/opencord/voltha-go/rw_core/graph"
-	fu "github.com/opencord/voltha-go/rw_core/utils"
+	fu "github.com/opencord/voltha-lib-go/pkg/flows"
 	"github.com/opencord/voltha-lib-go/pkg/log"
 	ofp "github.com/opencord/voltha-protos/go/openflow_13"
 	"github.com/opencord/voltha-protos/go/voltha"