Add core/fallback encoder behaviour (#20320)

keyboards/keyprez/rhino/rhino.c

@@ -17,12 +17,6 @@
 #include "quantum.h"
 #include QMK_KEYBOARD_H
 
-bool encoder_update_kb(uint8_t index, bool clockwise) {
-    if (!encoder_update_user(index, clockwise)) { return false; }
-    tap_code(clockwise ? KC_VOLU : KC_VOLD);
-    return true;
-}
-
 __attribute__ ((weak))
 const uint8_t music_map[MATRIX_ROWS][MATRIX_COLS] = LAYOUT_ortho_2x2u(
     0,