custom-pmpro-remove-existing-level-text.php

<?php
/**
 * Remove or change the "Your current membership level of %s will be removed when you complete your purchase."
 * text from 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/
 */
function my_custom_pmpro_remove_existing_level_text( $translated_text, $text, $domain ) {
	if ( $domain == 'paid-memberships-pro' && $text == 'Your current membership level of %s will be removed when you complete your purchase.' ) {
		// Set your custom string here. To remove the text and show nothing, return an empty string, e.g. return '';
		return '';
	}
	return $translated_text;
}
add_filter( 'gettext', 'my_custom_pmpro_remove_existing_level_text', 10, 3 );