chore(deps): Remove unused Python requirements

[Twixes]

Problem

Saw #21503 was opened to update idna, but that dependency actually seems to be unused.

Changes

I think all of the below production Python dependencies are unused:
defusedxml, idna, amqp, gevent, geoip2, importlib-metadata, kafka-helper, openapi-spec-validator, parso, pexpect, pickleshare, python3-saml, requests-oauthlib, urllib3

[webjunkie]

Reminds me of recent post:

https://news.ycombinator.com/item?id=39724132

[Twixes]

Oh, that's exactly the kind of thing I was thinking would be useful @webjunkie! Thanks, used it and found a few more seemingly-unused deps (though deptry seems to ignore deps that are used as Django middleware and such)

[Twixes]

(test_reload_external_data_source is currently failing on master, otherwise this is green)

[bretthoerner]

I've barely touched Python here, so I'm not sure how confident you should be in my review. 😅 But the two deps I have touched (pyarrow and temporalio) are still there.

(test_reload_external_data_source is currently failing on master, otherwise this is green)

So the 26 failed checks are just unrelated? I didn't dig in yet, tbh, they just look scary. :)

[Twixes]

Yeah, that was some bout of Cypress flakiness @bretthoerner

[bretthoerner]

Conflicts now 😢 but LGTM

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