[Keyboard] Code updates for macro3 (#15280)

Co-authored-by: filterpaper <filterpaper@localhost>

keyboards/macro3/keymaps/default/keymap.c

@@ -1,26 +1,14 @@
 /* Copyright 2020 David Philip Barr <@davidphilipbarr>
  * Copyright 2021 @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/>.
+ * SPDX-License-Identifier: GPL-2.0+
  */
 
 #include QMK_KEYBOARD_H
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     [0] = LAYOUT(
-        KC_HOME, KC_MUTE, KC_MPLY, KC_MSEL,
-        KC_UNDO, KC_CUT,  KC_COPY, LT(1,KC_PSTE)
+        KC_MUTE, KC_MPLY, KC_MRWD, LT(1,KC_MFFD),
+        C(KC_Z), C(KC_X), C(KC_C), C(KC_V)
     ),
     [1] = LAYOUT(
         _______, _______, _______, _______,