Remove hack to allow shared fourwire DC pin

Author: RetiredWizard

shared-bindings/fourwire/FourWire.c

@@ -69,8 +69,7 @@ static mp_obj_t fourwire_fourwire_make_new(const mp_obj_type_t *type, size_t n_a
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-//    const mcu_pin_obj_t *command = validate_obj_is_free_pin_or_none(args[ARG_command].u_obj, MP_QSTR_command);
-    const mcu_pin_obj_t *command = validate_obj_is_pin_or_none(args[ARG_command].u_obj, MP_QSTR_command);
+    const mcu_pin_obj_t *command = validate_obj_is_free_pin_or_none(args[ARG_command].u_obj, MP_QSTR_command);
     const mcu_pin_obj_t *chip_select = validate_obj_is_free_pin_or_none(args[ARG_chip_select].u_obj, MP_QSTR_chip_select);
     const mcu_pin_obj_t *reset = validate_obj_is_free_pin_or_none(args[ARG_reset].u_obj, MP_QSTR_reset);