[turbofan] Remove dead function Graph::VisitNodeInputsFromEnd().

src/compiler/graph.h

Index: src/compiler/graph.h
diff --git a/src/compiler/graph.h b/src/compiler/graph.h
index 28686aa2ca48eb1ac75ba13e2e31c05472edbd87..b53c7fd308338e1ab04a4433798ed0dbb7be5c77 100644
--- a/src/compiler/graph.h
+++ b/src/compiler/graph.h
@@ -87,9 +87,6 @@ class Graph : public ZoneObject {
   // Clone the {node}, and assign a new node id to the copy.
   Node* CloneNode(const Node* node);
 
-  template <class Visitor>
-  inline void VisitNodeInputsFromEnd(Visitor* visitor);
-
   Zone* zone() const { return zone_; }
   Node* start() const { return start_; }
   Node* end() const { return end_; }