Remove or change Joomla meta name "Generator"

Elegant solution:

    edit your template php file
    add the following code:

$document = &JFactory::getDocument();
/* @var $document JDocument */
$document->setGenerator('');

 Acceptable solution:

    go to includes/frontend.php - on line 195
    comment out:

// $mainframe->addMetaTag( 'Generator', $_VERSION->PRODUCT . ' - ' . $_VERSION->COPYRIGHT);