Wordpress is adding line breaks to my HTML code for my emails. I tried to follow online tutorials to remove the filter through functions php:

Can anyone help? Or explain why it's not working?

add_action('wpdiscuz_email_before_send_email', 'wpd_remove_wpautop_from_emails', 1);

function wpd_remove_wpautop_from_emails($args) {
    if ( isset($args['wpdiscuz_email_content']) ) {
        $args['wpdiscuz_email_content'] = str_replace(array('<p>', '</p>'), '', $args['wpdiscuz_email_content']);
        $args['wpdiscuz_email_content'] = str_replace(array('<br>', '<br />'), '', $args['wpdiscuz_email_content']);
    }
    return $args;
}