Revert "Add wxWindow::MSWAfterReparent() virtual function"

This reverts commit cd637663c8 (Add wxWindow::MSWAfterReparent() virtual
function, 2022-10-16) and removes wxListCtrl::MSWAfterReparent() added
in ff629f3853 (Fix drawing wxListCtrl since enabling double buffering by
default, 2022-10-16) which is not used any more now.

include/wx/msw/listctrl.h

@@ -396,8 +396,6 @@ protected:
 
     virtual void MSWUpdateFontOnDPIChange(const wxSize& newDPI) override;
 
-    virtual void MSWAfterReparent() override;
-
     virtual bool MSWGetDarkModeSupport(MSWDarkModeSupport& support) const override;
 
     virtual int MSWGetToolTipMessage() const override;

include/wx/msw/window.h

@@ -632,11 +632,6 @@ protected:
     virtual bool DoPopupMenu( wxMenu *menu, int x, int y ) override;
 #endif // wxUSE_MENUS_NATIVE
 
-    // Called by Reparent() after the window parent changes, i.e. GetParent()
-    // returns the new parent inside this function.
-    virtual void MSWAfterReparent();
-
-
     // the window handle
     WXHWND                m_hWnd;
 

src/msw/listctrl.cpp

@@ -365,11 +365,6 @@ void wxListCtrl::MSWInitHeader()
     m_headerCustomDraw->UseHeaderThemeColors(hwndHdr);
 }
 
-void wxListCtrl::MSWAfterReparent()
-{
-    // This is not used any more, to be removed.
-}
-
 WXDWORD wxListCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 {
     WXDWORD wstyle = wxListCtrlBase::MSWGetStyle(style, exstyle);

src/msw/window.cpp

@@ -1705,17 +1705,12 @@ bool wxWindowMSW::Reparent(wxWindowBase *parent)
 
     ::SetParent(hWndChild, hWndParent);
 
-    MSWAfterReparent();
-
-    return true;
-}
-
-void wxWindowMSW::MSWAfterReparent()
-{
     if ( wxHasWindowExStyle(this, WS_EX_CONTROLPARENT) )
     {
         EnsureParentHasControlParentStyle(GetParent());
     }
+
+    return true;
 }
 
 void wxWindowMSW::MSWDisableComposited()