From b9c8c1b185d63587d47355b1e9a11af48476a4ee Mon Sep 17 00:00:00 2001
From: Weilong Wu <veyron_wu@163.com>
Date: Wed, 19 Oct 2022 20:43:10 +0800
Subject: [PATCH] [Eager] polish general_grad (#47151)

---
 paddle/fluid/eager/general_grad.h | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/paddle/fluid/eager/general_grad.h b/paddle/fluid/eager/general_grad.h
index 3823255de23..27f6a7e609a 100644
--- a/paddle/fluid/eager/general_grad.h
+++ b/paddle/fluid/eager/general_grad.h
@@ -165,9 +165,6 @@ class GeneralGrad {
   void GetGraphInfoBetweenTargets(const std::deque<GradNodeBase*>& init_queue) {
     VLOG(6) << "Runing In GetGraphInfoBetweenTargets";
 
-    // Calculate in_degree for each node
-    std::unordered_map<GradNodeBase*, int> node_in_degree_map;
-
     // Copy nodes
     std::deque<GradNodeBase*> queue = init_queue;
     std::unordered_set<GradNodeBase*> visited;
@@ -196,12 +193,6 @@ class GeneralGrad {
           // Or it could also originated from dispensable inputs
           if (!next_node) continue;
 
-          // Update in_degree
-          if (!node_in_degree_map.count(next_node)) {
-            node_in_degree_map[next_node] = 0;
-          }
-          node_in_degree_map[next_node]++;
-
           // Record depending relationship
           (depending_nodes_)[next_node].emplace(node);
           queue.push_back(next_node);
-- 
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