rafacesar

This plugin makes the themes upgrade easy to the user. Using the admin upgrade messages and system.

WP Theme Update

This plugin helps to make a theme easier upgradable.

indextwo

Whenever WordPress performs a core update, it automatically pulls down the following files onto the root:
<ul>
<li><code>license.txt</code></li>
<li><code>readme.html</code></li>
<li><code>wp-config-sample.php</code></li>
</ul>
These files aren’t an inherent security risk by themselves; however they are uneccessary clutter on the root of your site (why would you want a <code>wp-config-sample.php</code> file on your production website?!); and it’s just another easy-to-read vector confirming that you have a WordPress site for script-kiddies to scrape and attack.
Simply install this plugin and it will clean up those files every time you perform a core WordPress update.

Core Files Update Cleanup

This plugin deletes the unnecessary license.txt, readme.html and wp-config-sample.php files after a core update.

WP Theme Update vs Core Files Update Cleanup