remove all cookie features from FollowRedirects

and provide documentation to user on how to achieve this
with another gem, faraday-cookie_jar

  https://github.com/miyagawa/faraday-cookie_jar

See discussion in:

  https://github.com/lostisland/faraday_middleware/pull/97
  https://github.com/lostisland/faraday_middleware/pull/89