diff --git a/python/paddle/fluid/dygraph/dygraph_to_static/utils.py b/python/paddle/fluid/dygraph/dygraph_to_static/utils.py
index d410df1589bb7ce07e78b08f2b799d0dcd84e9ee..ea5dbb45bc6d1d3f69a5ed61ce838c1de8dd5265 100644
--- a/python/paddle/fluid/dygraph/dygraph_to_static/utils.py
+++ b/python/paddle/fluid/dygraph/dygraph_to_static/utils.py
@@ -503,8 +503,6 @@ class IsControlFlowVisitor(gast.NodeVisitor):
 
     def _visit_For(self, node):
         assert isinstance(node, gast.For)
-        # TODO
-        # self.is_control_flow_num += 1
         if not isinstance(node.iter, gast.Call):
             return
         if not isinstance(node.iter.func, gast.Name):