Quick an easy way to remove author and current user from the notification recipients. Works in Edit Flow 0.4+

editflow-filter_recipients.php

<?php

function filter_recipients($recipients, $post) {
    // grab the users we want to filter
    $author = get_userdata($post->post_author);
    $current_user = wp_get_current_user();
    
    // Remove author and user who made the change from notification
    $recipients = array_values( array_diff( $recipients,array($author->user_email, $current_user->user_email) ) ); // sorta hacky way to remove the element, found here: http://www.bin-co.com/php/scripts/array_remove.php
    
    return $recipients;
}

add_filter('ef_notfication_recipients', 'filter_recipients', 10, 2);

?>