check for BACKLIGHT_ENABLE so this works on all keyboards

layouts/community/ortho_4x12/juno/keymap.c

@@ -240,6 +240,7 @@ layer_state_t layer_state_set_user(layer_state_t state) {
 layer_state_t layer_state_set_user(layer_state_t state) {
   // LED control, lighting up when Fn layer is activated
   state = update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
+#    ifdef BACKLIGHT_ENABLE
   switch (get_highest_layer(state)) {
     case _QWERTY:
       backlight_set(0);
@@ -251,6 +252,7 @@ layer_state_t layer_state_set_user(layer_state_t state) {
       backlight_set(3);
       break;
   }
+#    endif
   return state;
 }