Delete and *never use* ci_session cookie?

[eluser]IanMcQ[/eluser]
Hi,

I've recently switched over the authentication system on my site and it doesn't use ci_session, the stock Sessions class, or any of that stuff. However, since the stock Sessions class was used previously, user data from the old system is still stored in cookie "ci_session." How can I delete this cookie (or overwrite it with an empty array of data) and never use it again?

I want all traces of the ci_session cookie off the site basically. Let me know.