How to delete cookie with HttpOnly using PHP or JS

I have a cookie with these parameters:

Name:   workgroup_session_id
Content:    ""
Domain: agrobman1.tsi.lan
Path:   /
Send for:   Any kind of connection
Accessible to script:   No (HttpOnly)
Created:    Wednesday, November 4, 2015 at 9:31:58 AM
Expires:    When the browsing session ends

I have tried to delete the cookie using PHP using this code:

setcookie("workgroup_session_id", "\"\"", time() - 3600, "/", "agrobman1.tsi.lan", false, true);

But I am still unable to delete it. Does anyone know how to delete a cookie of this type using PHP or JS?