Remove no-longer-referenced src/port/gethostname.c.

This file hasn't been part of any build since 2005, and even before that
wasn't used unless you configured --with-krb4 (and had a machine without
gethostname(2), obviously).  What's more, we haven't actually called
gethostname anywhere since then, either (except in thread_test.c, whose
testing of this function is probably pointless).  So we don't need it.

diff --git a/src/port/gethostname.c b/src/port/gethostname.c
deleted file mode 100644 (file)
index 51bdfc8..0000000
--- a/src/port/gethostname.c
+++ /dev/null
@@ -1,33 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * gethostname.c
- *       gethostname using uname
- *
- * Portions Copyright (c) 1996-2015, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- * IDENTIFICATION
- *       src/port/gethostname.c
- *
- *-------------------------------------------------------------------------
- */
-
-#include "c.h"
-
-#include <sys/utsname.h>
-
-int
-gethostname(char *name, int namelen)
-{
-       static struct utsname mname;
-       static int      called = 0;
-
-       if (!called)
-       {
-               called++;
-               uname(&mname);
-       }
-       strncpy(name, mname.nodename, (SYS_NMLN < namelen ? SYS_NMLN : namelen));
-
-       return 0;
-}