Suggested by: http://www.galih.us/2014/12/cara-uninstall-easyengine.html

First:

ee system purge

changed to stack, so:

ee stack purge

Then:

rm -rf /etc/easyengine/;
rm -rf /etc/bash_completion.d/ee;
rm -rf /usr/local/sbin/ee;
rm -rf /usr/local/bin/ee;
rm -rf /usr/local/sbin/easyengine;
rm -rf /usr/share/easyengine;
rm -rf /var/www/*;
rm -rf /etc/nginx;
rm -rf /etc/php5;
rm -rf /etc/mysql;
rm -rf /var/lib/mysql;
rm -rf /etc/postfix;

And finally:

apt-get autoremove