Remove unused action_get_macro() usages in user files (#11165)

keyboards/staryu/keymaps/krusli/keymap.c

@@ -77,18 +77,8 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   )
 };
 
-const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt) {
-  return MACRO_NONE ;
-}
-
 void matrix_init_user(void) {
   for (int i=0; i<5; i++) {
     backlight_led_on(i);
   }
 }
-
-void matrix_scan_user(void) {
-}
-
-void led_set_user(uint8_t usb_led) {
-}