Remove SDL_quit

Removed upstream:
- 9c8c254af2
- f06f761c2f

SDL3-CS/SDL3/SDL_quit.cs

@@ -1,15 +0,0 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
-// See the LICENCE file in the repository root for full licence text.
-
-namespace SDL
-{
-    public partial class SDL3
-    {
-        [Macro]
-        public static unsafe bool SDL_QuitRequested()
-        {
-            SDL_PumpEvents();
-            return SDL_PeepEvents(null, 0, SDL_eventaction.SDL_PEEKEVENT, SDL_EventType.SDL_EVENT_QUIT, SDL_EventType.SDL_EVENT_QUIT) > 0;
-        }
-    }
-}

SDL3-CS/generate_bindings.py

@@ -112,7 +112,6 @@ headers = [
     add("SDL3/SDL_platform.h"),
     add("SDL3/SDL_power.h"),
     add("SDL3/SDL_properties.h"),
-    add("SDL3/SDL_quit.h"),
     add("SDL3/SDL_rect.h"),
     add("SDL3/SDL_render.h"),
     add("SDL3/SDL_revision.h"),