我想删除优惠券下拉功能，只需在结账页面上输入字段和“添加优惠券”按钮。有人知道我如何摆脱下拉功能吗？提前感谢您！

HTML：

if ( ! defined( \'ABSPATH\' ) ) {
    exit; // Exit if accessed directly
}

if ( ! wc_coupons_enabled() ) {
    return;
}

if ( ! WC()->cart->applied_coupons ) {
    $info_message = apply_filters( \'woocommerce_checkout_coupon_message\', __( \'Promo code?\', \'woocommerce\' ) . \' <a href="#" class="showcoupon">\' . __( \'Click here to enter your code\', \'woocommerce\' ) . \'</a>\' );
    wc_print_notice( $info_message, \'notice\' );
}
?>

<form class="checkout_coupon" method="post" style="display:none">

    <p class="form-row form-row-first">
        <input type="text" name="coupon_code" class="input-text" placeholder="<?php esc_attr_e( \'Promo Code\', \'woocommerce\' ); ?>" id="coupon_code" value="" />
    </p>

    <p class="form-row form-row-last">
        <input type="submit" class="button" name="apply_coupon" value="<?php esc_attr_e( \'Apply\', \'woocommerce\' ); ?>" />
    </p>

    <div class="clear"></div>
</form>