This website uses the Foswiki software to serve most of the pages. Foswiki uses a session cookie which is used to identify your browser when you login so you do not have to authenticate all the time.
If you have not registered as a user on the site, the session cookie is not used for anything. The session cookie is automatically deleted when you close the browser program. You can turn cookies off in your browser if you only want to read the pages on this site. But there is no need to because the session is not used for anything and deleted when you close the browser. There is no requirement to ask for censent for this type of cookies and you will therefore not be presented with any pop-op messages.
If you choose to register as a user, some additional cookies are used to store your edit windows size and a special cookie is used to prevent cross site scripting attacks when you edit and save. You cannot contribute to the pages on the wiki with cookies turned off. When you register as a user you give your consent to the use these cookies. To delete these cookies, looks for cookies with the word FOSWIKI in them. There are only a few.