Move backlight config to data driven (#19910)

keyboards/ai03/equinox/rev0/config.h

@@ -20,8 +20,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 // Fix for prototype missing COL0, COL1, using backlight and RGB underglow I/O pins
 #undef MATRIX_COL_PINS
 #define MATRIX_COL_PINS { C4, B7, C6, C7, B6, B5, B4, B3, B2, B1, B0, D6 }
-
-// This directs backlight code to use a disconnected pin, so the firwmare still has
-// backlight code and VIA support even though it doesn't do anything.
-#undef BACKLIGHT_PIN
-#define BACKLIGHT_PIN D1

keyboards/ai03/equinox/rev0/info.json

@@ -1,4 +1,9 @@
 {
+    "backlight": {
+        "pin": "D1",
+        "levels": 5,
+        "breathing": true
+    },
     "processor": "atmega32u2",
     "bootloader": "atmel-dfu"
 }