How to remove the whole "Self-Destructing Cookies" thing in the wiki manuals?

In the wiki manuals here on this page there's a ting called "Tweaking your browser to enhance security and privacy" and inside that one there's a link to a "Self-Destructing Cookies"-wiki page with an "Install extension" link which leads to a page that says "Not found, bla bla".

So. I remember vaguely asking baout this and I searched the forum here and yes, I did ask about it. And it seems that this particular add-on is a "legacy" addon.

So. How to remove the whole wiki-page? I tried to edit the "Tweaking your browser to enhance security and privacy" wiki page and I thought well I'll just delete all the text which seems relevant to the "Self-Destructing Cookies".

But that doesn't delete the page does it?