Remove add cart button in Woocommerce for a specific product category

Nov 2020 Update

To make it work with a product category you can use the WordPress conditional function has_term() this way:

add_action('woocommerce_single_product_summary', 'remove_product_description_add_cart_button', 1 );
function remove_product_description_add_cart_button() { // function for deleting ...
    // Set HERE your category ID, slug or name (or an array)
    $categories = array('your-category-1');

    //Remove Add to Cart button from product description of product with id 1234
    if ( has_term( $categories, 'product_cat', get_the_id() ) ) {
        remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_add_to_cart', 30 );
    }
}

Code goes in function.php file of your active child theme (or active theme). Or also in any plugin php file. Tested and works.