revert "build index on observable fields"
revert "build index on observable fields"

Change-Id: I05e2bb10d23d59fb94d5fc378cb5b92ddb2b45b4
Reviewed-on: http://review.couchbase.org/31140
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Pavel Paulau <dd88eded64e90046a680e3a6c0828ceb8fe8a0e7@gmail.com>

couchbase/cbmonitor,couchbase/cbmonitor