Scanning alert from other application

Hi,

I’ve already used some other scanner and it alerts about following file:
wp-content/plugins/ninjafirewall/install.php

with the following message:
This file is a PHP executable file and contains an eval() function and base64() decoding function on the same line. This is a common technique used by hackers to hide and execute code. If you know about this file you can choose to ignore it to exclude it from future scans.

So I wonder would you be willing to correct this or maybe it could be good enough just to remove this file after the plugin installation (if it isn’t required after NinjaFirewall finishes the installation)?

http://wordpress.org/plugins/ninjafirewall/