C4Application: Remove unused flag IsInGameTick

src/game/C4Application.cpp

@@ -53,7 +53,6 @@ C4Application::C4Application():
 		QuitAfterGame(false),
 		CheckForUpdates(false),
 		restartAtEnd(false),
-		is_in_game_tick(false),
 		pGamePadControl(nullptr),
 		AppState(C4AS_None),
 		pGameTimer(nullptr)
@@ -669,7 +668,6 @@ void C4Application::QuitGame()
 
 void C4Application::GameTick()
 {
-	is_in_game_tick = true;
 	// Exec depending on game state
 	switch (AppState)
 	{
@@ -743,7 +741,6 @@ void C4Application::GameTick()
 		if (pGamePadControl) pGamePadControl->Execute();
 		break;
 	}
-	is_in_game_tick = false;
 }
 
 void C4Application::Draw()

src/game/C4Application.h

@@ -36,8 +36,6 @@ public:
 	~C4Application();
 	// Flag for restarting the engine at the end
 	bool restartAtEnd;
-	// Flag set during game tick
-	bool is_in_game_tick;
 	// main System.ocg in working folder
 	C4Group SystemGroup;
 	C4MusicSystem MusicSystem;
@@ -52,7 +50,6 @@ public:
 	void ClearCommandLine();
 	// Tick timing
 	void GameTick();
-	bool IsInGameTick() const { return is_in_game_tick; }
 	void Draw();
 	// System.ocg helper funcs
 	bool OpenSystemGroup() { return SystemGroup.IsOpen() || SystemGroup.Open(C4CFN_System); }