[bug 690] remove inoperative NscTcp cwnd trace connect

examples/tcp/tcp-nsc-lfn.cc

@@ -42,12 +42,6 @@ using namespace ns3;
 
 NS_LOG_COMPONENT_DEFINE ("TcpNscLfn");
 
-static void 
-CwndTracer (uint32_t oldval, uint32_t newval)
-{
-  NS_LOG_INFO ("Moving cwnd from " << oldval << " to " << newval);
-}
-
 int main (int argc, char *argv[])
 {
 
@@ -137,10 +131,6 @@ int main (int argc, char *argv[])
       clientApp.Stop (Seconds (runtime + 1.0 + i));
     }
 
-  // Trace changes to the congestion window
-  Config::ConnectWithoutContext ("/NodeList/1/$ns3::NscTcpL4Protocol/SocketList/0/CongestionWindow", 
-                                 MakeCallback (&CwndTracer));
-
   // This tells ns-3 to generate pcap traces.
   PointToPointHelper::EnablePcapAll ("tcp-nsc-lfn");