orphaned codecov files

[grlee77]

Description

We used to run codecov via TravisCI, but I don't think we have run it since we moved to GitHub actions. I was looking into this due to a recent security incident. As far as I can tell, we should be unaffected here because I don't think we have run codecov after Jan 31st, 2021 when the issue first occured.

Which of the following actions should we take?:
1.) remove the unused .codecov.yml as well as mention of codecov in requirements files and contributor docs
2.) update our CI scripts to enable codecov again

If option 1, is there another coverage tool we should consider?

[hmaarrfk]

ohhhh, that is why codecov bot hasn't been working.

I think adding code coverage again would be good. I would prefer it if the bot didn't speak though.

[mkcor]

Could we do option 1 and include the same kind of code coverage as for local testing in our CI scripts?

• Update contribution guidelines about using TravisCI.