Strip hentry from WordPress posts...

remove_hentry.php

<?php
/**
 * Remove the hentry class from posts in WordPress - could really remove any class using various class filters,
 * like body_class using this technique.
 *
 * @param array $classes
 * @return array
 */

add_filter( 'post_class', 'fc_remove_hentry', 20 );
function fc_remove_hentry( $classes ) {
	if( ( $key = array_search( 'hentry', $classes ) ) !== false )
		unset( $classes[$key] );
	return $classes;
}
?>