CBQE-0: remove py-linux-upgrade.conf & py-windows-rolling-upgrade.conf

they are old and implementation doesn't exist for them anymore

Change-Id: Iac5014741d5f7957870ff71cf56ddcfebd80f52a
Reviewed-on: http://review.couchbase.org/34818
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>