#ifndef HUMAN_H_
# define HUMAN_H_ 1
-# if HAVE_CONFIG_H
-# include <config.h>
-# endif
-
# include <limits.h>
# include <stdbool.h>
# if HAVE_STDINT_H
# include <stdint.h>
# endif
-# if HAVE_UNISTD_H
-# include <unistd.h>
-# endif
+# include <unistd.h>
/* A conservative bound on the maximum length of a human-readable string.
The output can be the square of the largest uintmax_t, so double