Remove IfthenPay payment instructions from some WooCommerce emails

ifthen_send_email_instructions.php

<?php

add_filter( 'multibanco_ifthen_send_email_instructions', 'my_multibanco_ifthen_send_email_instructions', 10, 5 );
add_filter( 'mbway_ifthen_send_email_instructions', 'my_multibanco_ifthen_send_email_instructions', 10, 5 );
add_filter( 'creditcard_ifthen_send_email_instructions', 'my_multibanco_ifthen_send_email_instructions', 10, 5 );
add_filter( 'payshop_ifthen_send_email_instructions', 'my_multibanco_ifthen_send_email_instructions', 10, 5 );

function my_multibanco_ifthen_send_email_instructions( $send, $order, $sent_to_admin, $plain_text, $email ) {
	$emails_to_remove = array(
		'customer_completed_order',
		'customer_refunded_order'
		//You can add other emails here. You just need to check the id of each email of the WooCommerce files
	);
	if ( $email && $email->id ) return in_array( $email->id, $emails_to_remove );
	return $send;
}