Remove graceful exit hook

Might as well stick with ExitProcess, seeing as this is how the game is exited on Xbox.

UnleashedRecomp/game.cpp

@@ -1,23 +1,11 @@
 #include <cpu/guest_code.h>
 #include "api/SWA.h"
 #include "ui/window.h"
-#include "game.h"
 
 constexpr float m_baseAspectRatio = 16.0f / 9.0f;
 
 uint32_t m_lastCheckpointScore = 0;
 
-void Game::Exit()
-{
-    s_isSignalExit = true;
-}
-
-bool GracefulLoopExitMidAsmHook()
-{
-    // TODO (Sajid): investigate XAM handle closing causing assertion failure here.
-    return Game::s_isSignalExit;
-}
-
 #pragma region Aspect Ratio Hooks
 
 bool CameraAspectRatioMidAsmHook(PPCRegister& r31)

UnleashedRecomp/game.h

@@ -1,9 +0,0 @@
-#pragma once
-
-class Game
-{
-public:
-    inline static bool s_isSignalExit = false;
-
-    static void Exit();
-};

UnleashedRecomp/ui/window.cpp

@@ -2,7 +2,6 @@
 #include <config.h>
 #include <kernel/function.h>
 #include <SDL_syswm.h>
-#include "game.h"
 
 bool m_isFullscreenKeyReleased = true;
 
@@ -11,7 +10,6 @@ int Window_OnSDLEvent(void*, SDL_Event* event)
     // TODO (Hyper): prevent window changes during boot to avoid buffer resize crashes.
     switch (event->type)
     {
-        // TODO: use Game::Exit().
         case SDL_QUIT:
             ExitProcess(0);
             break;