Move a_dux to data-driven (#20043)

keyboards/a_dux/a_dux.c

@@ -1,22 +1,9 @@
-/* Copyright 2018-2020
- * ENDO Katsuhiro <ka2hiro@curlybracket.co.jp>
- * David Philip Barr <@davidphilipbarr>
- * Pierre Chevalier <pierrechevalier83@gmail.com>
- * @filterpaper
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
+// Copyright 2018-2020
+// ENDO Katsuhiro <ka2hiro@curlybracket.co.jp>
+// David Philip Barr <@davidphilipbarr>
+// Pierre Chevalier <pierrechevalier83@gmail.com>
+// SPDX-License-Identifier: GPL-2.0+
+
 #include "quantum.h"
 
 #ifdef SWAP_HANDS_ENABLE