move unmaintained files into outdated folder

If an old port is resurrected to work with current version code, its files
can be relocated to the appropriate sys or win folder as required.

In the meantime, the burden of upkeep can be avoided for the stuff in the
outdated folder for now.

sys/amiga/amigst.c

@@ -1,43 +0,0 @@
-/* NetHack 3.6	amigst.c	$NHDT-Date: 1432512794 2015/05/25 00:13:14 $  $NHDT-Branch: master $:$NHDT-Revision: 1.7 $ */
-/*    Copyright (c) Gregg Wonderly, Naperville, IL, 1992, 1993	  */
-/* NetHack may be freely redistributed.  See license for details. */
-
-#include <stdio.h>
-#include <exec/types.h>
-#include <exec/io.h>
-#include <exec/alerts.h>
-#include <exec/devices.h>
-#include <devices/console.h>
-#include <devices/conunit.h>
-#include <graphics/gfxbase.h>
-#include <intuition/intuition.h>
-#include <libraries/dosextens.h>
-#include <ctype.h>
-#undef strcmpi
-#include <string.h>
-#include <errno.h>
-
-#ifdef __SASC
-#include <dos.h> /* for __emit */
-#include <string.h>
-#include <proto/dos.h>
-#include <proto/exec.h>
-#include <proto/graphics.h>
-#include <proto/intuition.h>
-#include <proto/diskfont.h>
-#include <proto/console.h>
-#endif
-
-#include "hack.h"
-#include "winprocs.h"
-#include "winami.h"
-
-#ifdef AZTEC
-#include <functions.h>
-#endif
-
-#include "NH:sys/amiga/winami.p"
-#include "NH:sys/amiga/amiwind.p"
-#include "NH:sys/amiga/amidos.p"
-
-/* end amigst.c */