lint: ignore class self annotations

[davidcavazos]

Description

Ignore self annotations for class methods. Typing them require typing-extensions to use the Self type, which is redundant and does not provide new information. Otherwise, the class name is not available when defining methods since it hasn't finished defining, so it requires further hacks to annotate.

Furthermore, PEP 673 has made self type annotations unnecessary, but is only available on Python 3.11+.

Checklist

• I have followed Sample Guidelines from AUTHORING_GUIDE.MD
• README is updated to include all relevant information
• Tests pass: nox -s py-3.9 (see Test Environment Setup)
• Lint pass: nox -s lint (see Test Environment Setup)
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• Please merge this PR for me once it is approved.
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample

[dandhlee]

Thank you! This is great to have, I agree that it is redundant and extremely unnecessary. This can definitely be an optional addition if folks choose to use it, otherwise it should be ignored.

[leahecole]

Great catch