forgot to remove temp include

Author: Vladimir Ershov

src/scheduler_job.c

@@ -12,7 +12,6 @@
 #include "utils/builtins.h"
 #include "memutils.h"
 #include "port.h"
-#include <unistd.h> /* to remove */
 
 extern Oid scheduler_atjob_id_OID;