Removed no more threading code.

@@ -11,7 +11,6 @@ libmailbox_la_SOURCES = \
  pop3_apop.c       \
  pop3_apop.c       \
  pop3_capa.c       \
  pop3_capa.c       \
  pop3_carrier.c    \
  pop3_carrier.c    \
- pop3_cleanup.c    \
  pop3_connect.c    \
  pop3_connect.c    \
  pop3_create.c     \
  pop3_create.c     \
  pop3_dele.c       \
  pop3_dele.c       \

-/* GNU mailutils - a suite of utilities for electronic mail
-   Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Library Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include <stdio.h>
-#include <string.h>
-
-#include <mailutils/sys/pop3.h>
-#include <mailutils/md5-rsa.h>
-#include <mailutils/monitor.h>
-
-void
-pop3_cleanup (void *arg)
-{
-  pop3_t pop3 = (pop3_t)arg;
-  monitor_unlock (pop3->lock);
-  pop3->state = POP3_ERROR;
-}