gitadora: (arena model) unify window layout options (#706)

## Link to GitHub Issue or related Pull Request, if one exists
#0

## Description of change
Combine the two layout options into one

## Testing

- [x] windowed, x4
- [x] windowed, x2
- [x] windowed, x1 with sub
- [x] fs

src/spice2x/hooks/graphics/backends/d3d9/d3d9_device.cpp

@@ -260,9 +260,8 @@ HRESULT STDMETHODCALLTYPE WrappedIDirect3DDevice9::CreateAdditionalSwapChain(
         create_swap_chain = true;
 
     } else if (games::gitadora::is_arena_model() &&
-        (GRAPHICS_FORCE_SINGLE_ADAPTER ||
-            GRAPHICS_PREVENT_SECONDARY_WINDOW ||
-            GRAPHICS_GITADORA_HIDE_SIDE_WINDOWS)) {
+        (GRAPHICS_PREVENT_SECONDARY_WINDOWS || GRAPHICS_GITADORA_HIDE_SIDE_WINDOWS)) {
+
         if (pPresentationParameters->BackBufferWidth == 800) {
             // SMALL (subscreen)
             create_swap_chain = true;
@@ -275,7 +274,7 @@ HRESULT STDMETHODCALLTYPE WrappedIDirect3DDevice9::CreateAdditionalSwapChain(
                 index = 2;
             }
             create_fake_swap_chain = GRAPHICS_GITADORA_HIDE_SIDE_WINDOWS &&
-                !GRAPHICS_PREVENT_SECONDARY_WINDOW;
+                !GRAPHICS_PREVENT_SECONDARY_WINDOWS;
         } else {
             log_warning("graphics::d3d9", "unknown swap chain detected in CreateAdditionalSwapChain");
         }