Remove support for Win9x from wxMSW.

Most importantly, this allows us to remove all MSLU-related stuff.

Some functions which were previously loaded dynamically can now be just used
directly, too.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76535 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/combobox.cpp

@@ -390,7 +390,7 @@ bool wxComboBox::MSWShouldPreProcessMessage(WXMSG *pMsg)
 WXHWND wxComboBox::GetEditHWNDIfAvailable() const
 {
     WinStruct<COMBOBOXINFO> info;
-    if ( MSWGetComboBoxInfo(&info) )
+    if ( ::GetComboBoxInfo(GetHwnd(), &info) )
         return info.hwndItem;
 
     if (HasFlag(wxCB_SIMPLE))