[MeL/Node] Rm node connection information.

The connection information can be computed
on the fly required.

MeshLib/Node.h

@@ -56,9 +56,6 @@ public:
     /// Copy constructor
     Node(const Node &node);
 
-    /// Return all the nodes connected to this one
-    const std::vector<MeshLib::Node*>& getConnectedNodes() const { return _connected_nodes; }
-
     /// Get an element the node is part of.
     const Element* getElement(std::size_t idx) const { return _elements[idx]; }
 
@@ -82,14 +79,6 @@ protected:
     /// clear stored elements connecting to this node
     void clearElements() { _elements.clear(); }
 
-    /// Resets the connected nodes of this node. The connected nodes are
-    /// generated by Mesh::setNodesConnectedByElements().
-    void setConnectedNodes(std::vector<Node*> const& connected_nodes)
-    {
-        _connected_nodes = connected_nodes;
-    }
-
-    std::vector<Node*> _connected_nodes;
     std::vector<Element*> _elements;
 }; /* class */