Hide the confirm email and confirm password fields from the Paid Memberships Pro checkout page.

hide-confirm-email-password.php

<?php
/*
 * Don't show confirm password or email fields on the checkout page.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/ 
 */
add_filter( 'pmpro_checkout_confirm_password', '__return_false' );
add_filter( 'pmpro_checkout_confirm_email', '__return_false' );