Removes unused g_GameRestarted forgotten in 7ce4552f5e.

This was SVN commit r25885.

source/ps/Game.cpp

@@ -54,7 +54,6 @@
 
 #include <fstream>
 
-extern bool g_GameRestarted;
 extern GameLoopState* g_AtlasGameLoop;
 
 /**
@@ -344,8 +343,6 @@ PSRETURN CGame::ReallyStartGame()
 	if (CProfileManager::IsInitialised())
 		g_Profiler.StructuralReset();
 
-	g_GameRestarted = true;
-
 	return 0;
 }
 

source/ps/tests/stub_impl_hack.h

@@ -1,4 +1,4 @@
-/* Copyright (C) 2018 Wildfire Games.
+/* Copyright (C) 2021 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -20,8 +20,6 @@
 // usually defined by main.cpp, used by engine's scripting/ScriptFunctions.cpp,
 // must be included here to placate linker.
 
-bool g_GameRestarted;
-
 bool IsQuitRequested()
 {
 	return false;