Migrate SPLIT_HAND_PIN to json (#23924)

keyboards/handwired/split89/config.h

@@ -1,36 +0,0 @@
-/* Copyright 2021 jurassic73
-
-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/>.
-*/
-
-#pragma once
-
-/* this will be tied to high (VCC with a 2k to 10k resistor) on the left keyboard half and tied to low (GND using a wire jumper only) on the right keyboard half.  This allows a user to plug in a USB cable to either side and function correctly with or without a TRS/TRRS cable with a single hex file. */
-#define SPLIT_HAND_PIN D1
-
-/*
- * Feature disable options
- *  These options are also useful to firmware size reduction.
- */
-
-/* disable debug print */
-//#define NO_DEBUG
-
-/* disable print */
-//#define NO_PRINT
-
-/* disable action features */
-//#define NO_ACTION_LAYER
-//#define NO_ACTION_TAPPING
-//#define NO_ACTION_ONESHOT

keyboards/handwired/split89/keyboard.json

@@ -29,6 +29,9 @@
     "diode_direction": "COL2ROW",
     "split": {
         "enabled": true,
+        "handedness": {
+            "pin": "D1"
+        },
         "soft_serial_pin": "D0",
         "matrix_pins": {
             "right": {