MB-11000: remove extra include from ep.h

Change-Id: I690575d592de3fbde05035fc3002625b8fad41a9
Reviewed-on: http://review.couchbase.org/36497
Tested-by: Sundararaman Sridharan <sundar@couchbase.com>
Reviewed-by: Michael Wiederhold <mike@couchbase.com>