CBQE-1199: remove py-all-2-0.conf

we have the same set of tests in py-all.conf, py-all-dev.conf

Change-Id: I89314a4f4bfafd922d1b51514532073c4b6bba53
Reviewed-on: http://review.couchbase.org/36989
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>