revert r59246; the window parameter was there by purpose (i.e. for consistency with other Get* methods -- even if unused); document what the win parameter does in the various wxRenderer::Get* methods

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@59280 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/renderer.cpp

@@ -121,7 +121,7 @@ public:
 
     virtual void DrawFocusRect(wxWindow* win, wxDC& dc, const wxRect& rect, int flags = 0);
 
-    virtual wxSize GetCheckBoxSize() const;
+    virtual wxSize GetCheckBoxSize(wxWindow *win);
 
     virtual wxSplitterRenderParams GetSplitterParams(const wxWindow *win);
 };
@@ -428,7 +428,7 @@ wxRendererGTK::DrawComboBoxDropButton(wxWindow *win,
 }
 
 wxSize
-wxRendererGTK::GetCheckBoxSize() const
+wxRendererGTK::GetCheckBoxSize(wxWindow *WXUNUSED(win))
 {
     gint indicator_size, indicator_spacing;
     gtk_widget_style_get(wxGTKPrivate::GetCheckButtonWidget(),