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

src/compiler/graph.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_GRAPH_H_
 #define V8_COMPILER_GRAPH_H_
 
 #include "src/zone.h"
 #include "src/zone-containers.h"
 
@@ skipping 69 matching lines @@
   }
   Node* NewNode(const Operator* op, Node* n1, Node* n2, Node* n3, Node* n4,
                 Node* n5, Node* n6, Node* n7, Node* n8, Node* n9) {
     Node* nodes[] = {n1, n2, n3, n4, n5, n6, n7, n8, n9};
     return NewNode(op, arraysize(nodes), nodes);
   }
 
   // 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_; }
 
   void SetStart(Node* start) { start_ = start; }
   void SetEnd(Node* end) { end_ = end; }
 
   size_t NodeCount() const { return next_node_id_; }
 
   void Decorate(Node* node);
@@ skipping 22 matching lines @@
  public:
   virtual ~GraphDecorator() {}
   virtual void Decorate(Node* node) = 0;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_GRAPH_H_