forestdb.xml not needed anymore. deleted

Change-Id: I5c9fa72936600f6dc0ac76e892d02c83b3e5910f
Reviewed-on: http://review.couchbase.org/34676
Reviewed-by: Sundararaman Sridharan <sundar@couchbase.com>
Tested-by: Sundararaman Sridharan <sundar@couchbase.com>