r.GTSyncType 2​ console command causes incorrect frame rate display on Windows platform

The FRHIFrameFlipTrackingRunnable thread is not initialized on Windows, so RHIGetFrameRate always returns zero.

As a workaround, remove the code added by CalculateFPSTimings for Windows platform, and 5.0 behavior will be restored.
```
#if !PLATFORM_WINDOWS
    if (CVarGTSyncType->GetInt() == 2 && CVarVsync->GetInt() ! = 0).
   

#``endif
```

1. Launch the editor with any project
2. Start PIE
3. Open console command box and enter following commands

r.VSync 1
r.GTSyncType 2​
stat fps

Result :

The frame rate display shows 'inf FPS'