Remove legacy network code

src/GameLoop.cpp

@@ -18,7 +18,6 @@
 #include "InputMapper.h"
 #include "RageFileManager.h"
 #include "LightsManager.h"
-#include "NetworkSyncManager.h"
 #include "RageTimer.h"
 #include "RageInput.h"
 
@@ -283,7 +282,6 @@ void GameLoop::UpdateAllButDraw(bool bRunningFromVBLANK)
 	GAMESTATE->Update(fDeltaTime);
 	SCREENMAN->Update(fDeltaTime);
 	MEMCARDMAN->Update();
-	NSMAN->Update(fDeltaTime);
 
 	/* Important: Process input AFTER updating game logic, or input will be
 	* acting on song beat from last frame */