remove unneeded includes from mac/carbon/private.h

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39244 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mac/corefoundation/cfstring.h

@@ -18,6 +18,10 @@
     #include <CFString.h>
 #endif
 
+#include "wx/fontenc.h"
+
+class WXDLLIMPEXP_BASE wxString;
+
 void wxMacConvertNewlines13To10( char * data ) ;
 void wxMacConvertNewlines10To13( char * data ) ;
 void wxMacConvertNewlines13To10( wxString *data ) ;