删除Woocommerce中的“添加到购物车”按钮，但保留变体

<form class="cart" method="post" enctype="multipart/form-data">
    <?php
        do_action( 'woocommerce_before_add_to_cart_button' );
        do_action( 'woocommerce_before_add_to_cart_quantity' );
        woocommerce_quantity_input( array(
            'min_value'   => apply_filters( 'woocommerce_quantity_input_min', $product->get_min_purchase_quantity(), $product ),
            'max_value'   => apply_filters( 'woocommerce_quantity_input_max', $product->get_max_purchase_quantity(), $product ),
            'input_value' => isset( $_POST['quantity'] ) ? wc_stock_amount( wp_unslash( $_POST['quantity'] ) ) : $product->get_min_purchase_quantity(),
        ) );
        do_action( 'woocommerce_after_add_to_cart_quantity' );
    ?>
    <button type="submit" class="single_add_to_cart_button button alt"><?php echo esc_html( $product->single_add_to_cart_text() ); ?></button>
    <?php do_action( 'woocommerce_after_add_to_cart_button' ); ?>
</form>

<?php
    do_action( 'woocommerce_before_add_to_cart_button' );
    do_action( 'woocommerce_before_add_to_cart_quantity' );
    woocommerce_quantity_input( array(
        'min_value'   => apply_filters( 'woocommerce_quantity_input_min', $product->get_min_purchase_quantity(), $product ),
        'max_value'   => apply_filters( 'woocommerce_quantity_input_max', $product->get_max_purchase_quantity(), $product ),
        'input_value' => isset( $_POST['quantity'] ) ? wc_stock_amount( wp_unslash( $_POST['quantity'] ) ) : $product->get_min_purchase_quantity(),
    ) );
    do_action( 'woocommerce_after_add_to_cart_quantity' );
?>