Removed logic forcing vsync on if setting it off fails

The platforms that needed this (Windows Phone and Windows RT) are no longer supported, and if this is needed in the future it should be done at the renderer level, not here.

Fixes https://github.com/libsdl-org/SDL/issues/12475

(cherry picked from commit b99ff00a95fb54215246d454bf61bbcafb8b9bdc)

src/render/SDL_render.c

@@ -1122,12 +1122,7 @@ SDL_Renderer *SDL_CreateRendererWithProperties(SDL_PropertiesID props)
     }
 
     int vsync = (int)SDL_GetNumberProperty(props, SDL_PROP_RENDERER_CREATE_PRESENT_VSYNC_NUMBER, 0);
-    if (!SDL_SetRenderVSync(renderer, vsync)) {
-        if (vsync == 0) {
-            // Some renderers require vsync enabled
-            SDL_SetRenderVSync(renderer, 1);
-        }
-    }
+    SDL_SetRenderVSync(renderer, vsync);
     SDL_CalculateSimulatedVSyncInterval(renderer, window);
 
     SDL_LogInfo(SDL_LOG_CATEGORY_RENDER,
@@ -5492,7 +5487,8 @@ bool SDL_SetRenderVSync(SDL_Renderer *renderer, int vsync)
     }
 #endif
 
-    if (!renderer->SetVSync) {
+    if (!renderer->SetVSync ||
+        !renderer->SetVSync(renderer, vsync)) {
         switch (vsync) {
         case 0:
             renderer->simulate_vsync = false;
@@ -5503,12 +5499,6 @@ bool SDL_SetRenderVSync(SDL_Renderer *renderer, int vsync)
         default:
             return SDL_Unsupported();
         }
-    } else if (!renderer->SetVSync(renderer, vsync)) {
-        if (vsync == 1) {
-            renderer->simulate_vsync = true;
-        } else {
-            return false;
-        }
     }
     SDL_SetNumberProperty(SDL_GetRendererProperties(renderer), SDL_PROP_RENDERER_VSYNC_NUMBER, vsync);
     return true;