Remove ex-TC Github privileges for @jmacd

[jmacd]

I resigned from the Technical Committee a couple of months ago. I still have escalated privileges from those days.

I've been removed from this list: https://github.com/orgs/open-telemetry/teams/technical-committee

See

https://github.com/orgs/open-telemetry/people/jmacd

indicates that I am in 4 teams, which looks correct. However, it also states:

jmacd has admin access to all repositories that belong to the open-telemetry organization because jmacd is an owner.

Really, I think of myself as owner for two repos:

https://github.com/open-telemetry/otel-arrow
https://github.com/open-telemetry/otel-arrow-collector (archived)

I appear to be unable to remove myself as owner (for all including the two above) in all cases.

Please help, I don't want to accidentally merge PRs that I shouldn't have power to!

[trask]

Thanks! I've removed you as an org owner. Let me know if that addresses everything you've noticed.