revert previous change as unistd.h breaks things in sfio

diff --git a/ast_common.h.in b/ast_common.h.in
index e51fb61f4c47e4598f3a7f794a169540f4b59081..f57967e51ac768cb8a536ca83026d12deea27844 100644 (file)
--- a/ast_common.h.in
+++ b/ast_common.h.in
@@ -207,10 +207,6 @@ typedef int ssize_t;
 #endif
 #endif
 
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
 #ifndef MAXINT
 #define MAXINT INT_MAX
 #endif