pmpro-profile-edit-page-hide-submit-button.php

<?php
/**
 * Hide the submit button on the member profile edit 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_pmpro_profile_edit_page_hide_submit_button() {
	global $pmpro_pages;

	// Are we on the member profile edit page?
	if ( empty( $pmpro_pages ) || ! isset( $pmpro_pages['member_profile_edit'] ) || ! is_page( $pmpro_pages['member_profile_edit'] ) ) {
		return;
	}
	?>
	<style>
		#member-profile-edit div.pmpro_submit {
			display: none;
		}
	</style>
	<?php
}
add_action( 'wp_head', 'my_pmpro_profile_edit_page_hide_submit_button' );