remove dead method declaration and dead use

src/node/udp-socket.cc

@@ -34,7 +34,7 @@ UdpSocket::UdpSocket (Node *node)
     m_shutdownRecv (false),
     m_connected (false)
 {
-  NS_ASSERT (GetUdp () != 0);
+  NS_ASSERT (m_node->GetUdp () != 0);
   m_udp = m_node->GetUdp ();
   m_node->Ref ();
 }

src/node/udp-socket.h

@@ -77,7 +77,6 @@ private:
   int FinishBind (void);
   void ForwardUp (const Packet &p, Ipv4Address saddr, uint16_t sport);
   void Destroy (void);
-  Udp *GetUdp (void) const;
   int DoSendPacketTo (const Packet &p, Ipv4Address daddr, uint16_t dport,
 		      ns3::Callback<void, Socket*, uint32_t> dataSent);