Remove support for Digital Mars compiler.

This compilers is not being developed any longer since many years, drop
support for it.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76547 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/strconv.h

@@ -16,10 +16,6 @@
 #include "wx/chartype.h"
 #include "wx/buffer.h"
 
-#ifdef __DIGITALMARS__
-#include "typeinfo.h"
-#endif
-
 #include <stdlib.h>
 
 class WXDLLIMPEXP_FWD_BASE wxString;