add autoflake to .pre-commit-config.yaml to automatically remove unused imports

[jasonwbarnett]

I observed a lot of ci failures related to unused typing imports being reported by flake8. This change makes it so that these will automatically get cleaned up by the pre-commit.ci bot.

[Nusnus]

Can you ref/link such a failure please?
One that this change should handle automatically if I understand correctly.

To give me context mostly

Thanks!

[jasonwbarnett]

Can you ref/link such a failure please? One that this change should handle automatically if I understand correctly.

To give me context mostly

Thanks!

@Nusnus It's hard because I don't know how to find past pre-commit.ci pipelines, but here is one I had to change by hand, a9f357f in #1631

[Nusnus]

-i, --in-place make changes to files instead of printing diffs

Cool

--imports IMPORTS by default, only unused standard library imports are removed; specify a comma-separated list of additional modules/packages

What does the --imports here is supposed to affect, based on the above doc?
The default should work without en empty --imports, no?

--remove-unused-variables
remove unused variables

This might also be interesting, but I'm not 100% sure.

[Nusnus]

kombu/transport/redis.py:1346:1: E303 too many blank lines (3)

[Nusnus]

https://results.pre-commit.ci/run/github/735498/1672162368.nnwd2OjEQLm19RjMnRcsjg

[jasonwbarnett]

I'll start working through this now :)

Thanks for pointing out.

[auvipy]

pre commits are passing now

[auvipy]

but the lint CI is failing