Move encoder config to data driven (#19923)

Co-authored-by: Nick Brassel <nick@tzarc.org>

keyboards/rart/rart75/config.h

@@ -30,6 +30,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 /* Locking resynchronize hack */
 #define LOCKING_RESYNC_ENABLE
-
-#define ENCODERS_PAD_A { E6 }
-#define ENCODERS_PAD_B { B0 }

keyboards/rart/rart75/info.json

@@ -8,6 +8,11 @@
         "pid": "0x0075",
         "device_version": "0.0.1"
     },
+    "encoder": {
+        "rotary": [
+            {"pin_a": "E6", "pin_b": "B0"}
+        ]
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu",
     "layouts": {