Removing iron-functions from homebrew

Hi,

I'm filing this issue to communicate that iron-functions is about to get removed from homebrew. I filed a pull request there to remove the iron-functions formula:

https://github.com/Homebrew/homebrew-core/pull/47837

The iron-functions formula blocks upgrading the go formula and is holding back important security fixes (tracked in Homebrew/homebrew-core#47510).