functions.php

<?php

// Removee "Protected" and "Private" from Protected and Private Posts

function afn_title_trim($title) {
  $title = attribute_escape($title);
	$findthese = array(
		'#Protected: #', // Notice the blank space after Protected:
		'#Private: #' // Notice again, otherwise the title get pushed.
	);
	$replacewith = array(
		'', // What to replace "Protected: " with
		'' // What to replace "Private: " with
	);
	$title = preg_replace($findthese, $replacewith, $title);
	return $title;
}
add_filter('the_title', 'afn_title_trim');