remove rook.c (will be in a single move.c)

src/rook.c

@@ -1,22 +0,0 @@
-/* rook.c - A simple pool manager.
- *
- * Copyright (C) 2021 Bruno Raoult ("br")
- * Licensed under the GNU General Public License v3.0 or later.
- * Some rights reserved. See COPYING.
- *
- * You should have received a copy of the GNU General Public License along with this
- * program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.htmlL>.
- *
- * SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
- *
- */
-
-#include "chessdefs.h"
-#include "position.h"
-#include "fen.h"
-
-/*
-rook_move_list(POS *position)
-{
-}
-*/