TEC/ECP post_class filter issue

/**
 * Removes the Tribe post_class filter on the first occasion that filter is
 * used, then sets it up again for future calls.
 *
 * @param array $classes
 * @return array
 */
function remove_tribe_cat_once(array $classes) {
    static $count = 0;

    if ($count++ === 0) {
        remove_filter('post_class', array(TribeEvents::instance(), 'post_class'));
    }
    else {
        add_filter('post_class', array(TribeEvents::instance(), 'post_class'));
        remove_filter('post_class', 'remove_tribe_cat_once');
    }

    return $classes;
}

// Try to stop the first event category from being added to the article classes
// (when the default page template is used)
add_filter('post_class', 'remove_tribe_cat_once', 1);