Move SOFT_SERIAL_PIN to data driven (#19863)

keyboards/handwired/not_so_minidox/config.h

@@ -25,11 +25,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS { D7, E6, B4, B5 }
 #define MATRIX_COL_PINS { B6, B2, B3, B1, F7, D4 }
 
-/*
- * Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
- */
-#define SOFT_SERIAL_PIN D0  // or D1, D2, D3, E6
-
 //#define EE_HANDS
 
 #define MASTER_LEFT

keyboards/handwired/not_so_minidox/info.json

@@ -8,6 +8,9 @@
     "pid": "0x3060",
     "device_version": "0.0.1"
   },
+  "split": {
+    "soft_serial_pin": "D0"
+  },
   "processor": "atmega32u4",
   "bootloader": "caterina",
   "layouts": {