Remove 'Renew' link and prevent checkout if user already has membership level

my_pmpro_prevent_renewal.php

<?php

// Copy from below here.

add_action('pmpro_is_level_expiring_soon', '__return_false', 10, 2);

// Check if they have a specific level, and prevent them from signing up for a specific level
function my_pmpro_prevent_renewal( $continue ) {

	global $pmpro_level;

	if ( pmpro_hasMembershipLevel( array( 1, 7, 2 ) ) ) {
		//They have level 1, 7 or 2, we don't want them to sign up for 11
		if( ! empty( $_REQUEST['level'] ) && intval( $_REQUEST['level'] ) == 11 ) {
			$continue = false;
			pmpro_setMessage( 'You already have this level.', 'pmpro_error' );
		}
	}

	return $continue;
}
add_filter( 'pmpro_registration_checks', 'my_pmpro_prevent_renewal' );