Add core/fallback encoder behaviour (#20320)

keyboards/orthocode/orthocode.c

@@ -44,16 +44,3 @@ bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
     }
     return true;
 }
-
-#ifdef ENCODER_ENABLE
-bool encoder_update_kb(uint8_t index, bool clockwise) {
-    if (!encoder_update_user(index, clockwise)) { return false; }
-    // Volume control
-    if (clockwise) {
-        tap_code(KC_VOLU);
-    } else {
-        tap_code(KC_VOLD);
-    }
-    return true;
-}
-#endif