Add core/fallback encoder behaviour (#20320)

keyboards/lyso1/lck75/lck75.c

@@ -14,18 +14,6 @@
  */
 #include "lck75.h"
 
-bool encoder_update_kb(uint8_t index, bool clockwise) {
-    if (!encoder_update_user(index, clockwise)) return false;
-    if (index == 0) {
-        if (clockwise) {
-            tap_code(KC_VOLU);
-        } else {
-            tap_code(KC_VOLD);
-        }
-    }
-    return true;
-}
-
 #define IDLE_FRAMES 5
 #define IDLE_SPEED 30
 #define TAP_FRAMES 2