Remove Palm OS port.

The platform targeted by this port doesn't exist any more and the port never
achieved really working state so remove the code to avoid having to maintain
it.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70345 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/log.h

@@ -57,11 +57,9 @@ class WXDLLIMPEXP_FWD_BASE wxObject;
 
 #include "wx/arrstr.h"
 
-#ifndef __WXPALMOS5__
 #ifndef __WXWINCE__
     #include <time.h>   // for time_t
 #endif
-#endif // ! __WXPALMOS5__
 
 #include "wx/dynarray.h"
 #include "wx/hashmap.h"