Fix errno usage

C/arrays.c

@@ -93,10 +93,6 @@ arrays. Memory mapped arrays are limited by available space in the file
 system and in the virtual memory space.
 
 The following predicates manipulate arrays:
-
-
-
-
 */
 
 #include "Yap.h"
@@ -104,11 +100,6 @@ The following predicates manipulate arrays:
 #include "clause.h"
 #include "eval.h"
 #include "heapgc.h"
-#if HAVE_ERRNO_H
-#include <errno.h>
-#else
-extern int errno;
-#endif
 #if HAVE_STRING_H
 #include <string.h>
 #endif