Cleanup Source Fail reporting

All Stream report failure with logs, read in InfoVisitor for Sources. ImGuiVisitor for Sources also detect failure of source and its stream.
Cleanup of unused includes and functions.

src/NetworkSource.h

@@ -5,11 +5,9 @@
 #include "Connection.h"
 #include "StreamSource.h"
 
-
 class NetworkStream : public Stream
 {
 public:
-
     NetworkStream();
 
     void connect(const std::string &nameconnection);