Delete the OSC Flocknote organization

[geerlingguy]

After a few weeks/months, we should delete the Flocknote OSC organization so people are only directed towards the Google Groups mailing list... I've already made the Catholic Developers list hidden by default, so nobody can join it by themselves, but I'm not sure how long we should let the list stay at this point.

See related: #4

[geerlingguy]

Just FYI, I logged into my Flocknote account for the first time since about 2016 today, and it looks like there's no simple/built-in way to delete an organization currently. So for now I'll just leave it alone.