[pungi-fedora] PR #559: Drop reviewboard-3.0

[Patrick "マルタインアンドレアス" Uiterwijk]

puiterwijk merged a pull-request against the project: `pungi-fedora` that you are
following.

Merged pull-request:

``
Drop reviewboard-3.0
``

https://pagure.io/pungi-fedora/pull-request/559