Deleting unnecessary or unwanted things from a database is something new to me, but here is what I would try:
https://www.google.com/search?q=wordpress+database+cookie+opt led to this: http://wordpress.org/plugins/cookillian/
And, a broader search is here:
However, I believe your specific problem has to do with SSL:
This Connection is Untrusted
You have asked Firefox to connect securely to portale.aipros.org, but we can't confirm that your connection is secure.
Normally, when you try to connect securely, sites will present trusted identification to prove that you are going to the right place. However, this site's identity can't be verified.
So, and unless you simply need to add an SSL certificate to the site, maybe a given plugin would at least indirectly reveal what kind of search you might need to do in the database to find whatever might already be there in relation to SSL. If so, phpMyAdmin at your server (host) cPanel should let you first do a complete backup of your database, then search for and delete whatever you have noted from the above. I have done that kind of thing successfully with only one glitch someone else is fixing for me, just look at things very closely before deleting anything.