chore: remove use of six and mock

[s-t-e-v-e-n-k]

mock has been in the standard library since Python 3.3, and six stopped being required when Python 2 support was dropped, so remove both of them.

[github-actions]

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[marandaneto]

@s-t-e-v-e-n-k can you rebase and target the main branch instead? thanks for the PR

[s-t-e-v-e-n-k]

@s-t-e-v-e-n-k can you rebase and target the main branch instead? thanks for the PR

Done!

[marandaneto]

@s-t-e-v-e-n-k can you rebase and target the main branch instead? thanks for the PR

Done!

you still need to force push with a signed commit, sorry forgot to mention that
we dont merge PRs if commits arent signed

[s-t-e-v-e-n-k]

you still need to force push with a signed commit, sorry forgot to mention that we dont merge PRs if commits arent signed

I've rebased this, and signed this, my email address has changed to match my GPG key, but it's still me.

[marandaneto]

thanks @s-t-e-v-e-n-k