Remove Joomla Meta Tag Generator

If you view the source code after a Joomla installation, you will see:
<meta name="generator" content="Joomla! 1.5 - Open Source Content Management" />

If you want to remove this code, there are a couple of ways to do so.

Here is one simple method to remove the generator tag
1) Open the file:
/libraries/joomla/document/html/renderer/head.php
2) Comment the following line:
$strHtml .= $tab.'<meta name="generator" content="'.$document->getGenerator().'" />'.$lnEnd;

The new line is:
//$strHtml .= $tab.'<meta name="generator" content="'.$document->getGenerator().'" />'.$lnEnd;

3) Save the file.