Remove @madkinsz as a codeowner

[zanieb]

No description provided.

[cicdw]

Thanks @zanieb ! I'll figure out the test failures and either commit to your fork or let you know what I changed; it'll be a bittersweet merge

[jawnsy]

I'll figure out the test failures

@cicdw I think the failures are related to us revoking Circle permissions and not getting around to fixing them. I'd proposeremoving them as required checks and merging this change for now (or merging #419 instead), then I can look at fixing our CI in a follow-up

[jawnsy]

Obsoleted by #419