Remove cookie dependency

[ejizba]

Background: The cookie package was added as a part of http stream support in this PR. Previously, the host handled cookie stuff for us, but with http streams we had to do it ourselves.

Breaking change: The easiest solution is to just remove cookie support and tell customers to use the cookie package directly in their own code if they want to use cookies. That's what my branch does. The alternative is to work with the host team so that they handle cookies for us even in the http stream scenario.

Branch to remove: ej/removeCookie