Don't clear the clipboard on quit

Fixes https://github.com/libsdl-org/SDL/issues/8830

src/video/SDL_video.c

@@ -3788,9 +3788,6 @@ void SDL_VideoQuit(void)
         return;
     }
 
-    /* Make sure we don't try to serve clipboard data after this */
-    SDL_ClearClipboardData();
-
     /* Halt event processing before doing anything else */
     SDL_QuitTouch();
     SDL_QuitMouse();