Removing specs usage from the CookieMapSpec.

As per the discussion over on this [twitter/util](https://github.com/twitter/util/pull/97) PR I was going to help out with moving a bunch of twitter projects over to cross compile with 2.11. This is just a "sample" PR to make sure the style and everything was going to be okay to be merged. 
Good catch!  Yes, that would be better.