Remove unneeded headers

svn path=/head/; revision=282686

usr.sbin/pw/fileupd.c

@@ -29,15 +29,7 @@ static const char rcsid[] =
   "$FreeBSD$";
 #endif /* not lint */
 
-#include <stdio.h>
-#include <fcntl.h>
 #include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/param.h>
-#include <errno.h>
-#include <unistd.h>
 
 #include "pwupd.h"