Windows: Fixed not removing the always added hint callback on quit.

This was no real problem because SDL_Quit() also calls SDL_ClearHints().
diff --git a/src/timer/windows/SDL_systimer.c b/src/timer/windows/SDL_systimer.c
index d2d30c8..5c9121a 100644
--- a/src/timer/windows/SDL_systimer.c
+++ b/src/timer/windows/SDL_systimer.c
@@ -107,10 +107,8 @@
 void
 SDL_TicksQuit(void)
 {
-    if (!hires_timer_available) {
-        SDL_DelHintCallback(SDL_HINT_TIMER_RESOLUTION,
-                            SDL_TimerResolutionChanged, NULL);
-    }
+    SDL_DelHintCallback(SDL_HINT_TIMER_RESOLUTION,
+                        SDL_TimerResolutionChanged, NULL);
 
     SDL_SetSystemTimerResolution(0);  /* always release our timer resolution request. */