Remove default columns from the Members List. In this example, we are removing Level and Level ID columns.

custom_manage_memberslist_columns.php

<?php
/**
 * Remove default columns from the Members List. In this example, we are removing Level and Level ID columns.
 * You can also optionally toggle these columns off manually in the "Screen Options" area. 
 *
 * 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 custom_manage_memberslist_columns( $columns ) {
	unset( $columns['membership'] );
	unset( $columns['membership_id'] );
	return $columns;
}
add_filter( 'pmpro_manage_memberslist_columns', 'custom_manage_memberslist_columns' );