diff --git a/ge/graph/build/logical_stream_allocator.h b/ge/graph/build/logical_stream_allocator.h
index 46d4c44d..b9aec611 100644
--- a/ge/graph/build/logical_stream_allocator.h
+++ b/ge/graph/build/logical_stream_allocator.h
@@ -147,18 +147,6 @@ class NodeStreamUpdatePass : public LogicalStreamPass {
  public:
   STREAM_PASS_DEFAULT_FUNC(NodeStreamUpdatePass);
   Status Run(ComputeGraphPtr graph, const std::vector<SubgraphPtr> &subgraphs, Context &context) override;
-
- private:
-  /// Optimize for case like:
-  ///  NodeA(stream1) -> Const(stream2) -> NodeB(stream1)
-  /// To case:
-  ///  NodeA(stream1) -> Const(stream1) -> NodeB(stream1)
-  /// Which could reduce event number (Const could be other type which belong to skipped engine subgraph)
-  Status UpdateForSkippedEngine(const ComputeGraphPtr &graph, const std::vector<SubgraphPtr> &subgraphs);
-
-  int64_t GetSingleInoutStream(const NodePtr &node) const;
-  // Judge if all predecessors' streams of node are kInvalidStream
-  bool AreAllPredStreamsInvalid(const NodePtr &node) const;
 };
 
 // Update the stream of subgraphs to nodes.