Wordpress - Disabling Comment Notifications for Post Author

I skimmed through the source of the wp_notify_postauthor() function and noticed the comment_notification_recipients filter.

I wonder if you could simplify your plugin to the following code snippet:

<?php
 /** 
  * Plugin Name: Disable comment/trackback/pingback notifications emails 
  * Plugin URI:  http://wordpress.stackexchange.com/a/150141/26350
  */

add_filter( 'comment_notification_recipients', '__return_empty_array', PHP_INT_MAX );
add_filter( 'comment_moderation_recipients',   '__return_empty_array', PHP_INT_MAX );

where we use an empty $emails array to prevent any notification emails from being sent.

The first filter is to stop wp_notify_postauthor() and the second to stop wp_notify_moderator().

If you want only the admin user to receive email notifications, you can use this version:

<?php
 /** 
  * Plugin Name: Disable comment/trackback/pingback notifications emails except for admins.
  * Plugin URI:  http://wordpress.stackexchange.com/a/150141/26350
  */

add_filter( 'comment_notification_recipients', '__return_empty_array', PHP_INT_MAX );
add_filter( 'comment_moderation_recipients', 
    function( $emails )
    {
        // only send notification to the admin:
        return array( get_option( 'admin_email' ) );
    }
, PHP_INT_MAX );

We could also override these two pluggable functions, but I don't use that here.