Remove WindowBase::IsLegacy() function (#21572)

src/openrct2-ui/interface/Window.cpp

@@ -638,10 +638,7 @@ void WindowDrawWidgets(WindowBase& w, DrawPixelInfo& dpi)
             {
                 if (w.windowPos.y + widget->top < dpi.y + dpi.height && w.windowPos.y + widget->bottom >= dpi.y)
                 {
-                    if (w.IsLegacy())
-                        WidgetDraw(dpi, w, widgetIndex);
-                    else
-                        w.OnDrawWidget(widgetIndex, dpi);
+                    w.OnDrawWidget(widgetIndex, dpi);
                 }
             }
         }
@@ -691,11 +688,6 @@ void InvalidateAllWindowsAfterInput()
     });
 }
 
-bool Window::IsLegacy()
-{
-    return false;
-}
-
 void Window::OnDraw(DrawPixelInfo& dpi)
 {
     WindowDrawWidgets(*this, dpi);

src/openrct2-ui/interface/Window.h

@@ -14,7 +14,6 @@
 
 struct Window : WindowBase
 {
-    virtual bool IsLegacy() override;
     virtual void OnDraw(DrawPixelInfo& dpi) override;
     virtual void OnDrawWidget(WidgetIndex widgetIndex, DrawPixelInfo& dpi) override;
 

src/openrct2/interface/Window_internal.h

@@ -80,11 +80,6 @@ struct WindowBase
 
     WindowBase& operator=(const WindowBase&) = delete;
 
-    virtual bool IsLegacy()
-    {
-        return true;
-    }
-
     // Events
     virtual void OnOpen()
     {