Convert eeconfig_init_kb implementations to config (#24087)

keyboards/0xcb/1337/1337.c

@@ -1,27 +0,0 @@
-/*
-Copyright 2021 0xCB - Conor Burns
-
-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/>.
-*/
-#include "quantum.h"
-
-void eeconfig_init_kb(void) {
-#ifdef BACKLIGHT_ENABLE
-    backlight_enable();
-    backlight_level(5);
-#endif
-
-    eeconfig_update_kb(0);
-    eeconfig_init_user();
-}

keyboards/0xcb/1337/keyboard.json

@@ -9,6 +9,9 @@
     "device_version": "0.0.1"
   },
   "backlight": {
+    "default": {
+      "brightness": 5
+    },
     "pin": "B5",
     "levels": 7,
     "breathing": true