delete one class, 2 class are the same

src/traversal/traversal_node_octree.h

@@ -926,40 +926,6 @@ public:
   const OcTreeSolver* otsolver;
 };
 
-/// @brief Traversal node for octree distance
-class OcTreeDistanceTraversalNode : public DistanceTraversalNodeBase
-{
-public:
-  OcTreeDistanceTraversalNode()
-  {
-    model1 = NULL;
-    model2 = NULL;
-
-    otsolver = NULL;
-  }
-
-
-  FCL_REAL BVDistanceLowerBound(int, int) const
-  {
-    return -1;
-  }
-
-  bool BVDistanceLowerBound(int, int, FCL_REAL&) const
-  {
-    return false;
-  }
-
-  void leafComputeDistance(int, int) const
-  {
-    otsolver->OcTreeDistance(model1, model2, tf1, tf2, request, *result);
-  }
-
-  const OcTree* model1;
-  const OcTree* model2;
-
-  const OcTreeSolver* otsolver;
-};
-
 /// @brief Traversal node for shape-octree collision
 template<typename S>
 class ShapeOcTreeCollisionTraversalNode : public CollisionTraversalNodeBase