Looks unused

PATH_MAX was reported unused on Windows with clang-cl, but the whole block seems
rather a leftover than something that is really required.

Change-Id: I545701ef83de0c2a1d74457778b86b70e334a457

sfx2/source/appl/app.cxx

@@ -19,15 +19,6 @@
 
 #include <config_features.h>
 
-#if defined UNX
-#include <limits.h>
-#else // UNX
-#include <stdlib.h>
-#ifndef PATH_MAX
-#define PATH_MAX _MAX_PATH
-#endif
-#endif // UNX
-
 #include <sfx2/app.hxx>
 #include <sfx2/frame.hxx>
 #include <basic/basrdll.hxx>