expire httpOnly cookie is request

Hi. If you just want to prevent a client cookie from reaching the server then HTTP::cookie remove "mycookie" in HTTP_REQUEST will work fine.

If you actually want to expire a cookie from the client to stop it from sending it in subsequent requests, then you need to set the cookie Expires date to the past;-

when HTTP_RESPONSE {
        HTTP::header insert Set-Cookie "mycookie=xx; Path=/; Expires=Thu, 01 Jan 1970 00:00:01 GMT; HttpOnly"
}

Note that this example assumes the cookie was set on the current domain, not a parent domain, and that the Path was /.