Remove "Protected" and "Private" prefixes from post tiltes

functions.php

<?php
/* Removing private and proected prefixes from post titles */
/* uses two filters 
*  protected_title_format and private_title_format 
*/

function spi_remove_private_protected_from_titles( $format ) {
	return '%s';
}
add_filter( 'protected_title_format', 'spi_remove_private_protected_from_titles' );
add_filter( 'private_title_format',   'spi_remove_private_protected_from_titles' );