CBQE-0: rm old conf/py-bat-newrebalance.conf

Change-Id: I8da2b20e09d154bba0c8ae7a84fb40ded0de3a48
Reviewed-on: http://review.couchbase.org/26246
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>