__parameters__ should not be a documented property of the API

[cbourjau]

The __parameters__ property is currently part of the Column's, DataFrame's, and GroupBy's APIs: https://data-apis.org/dataframe-api/draft/search.html?q=__parameters__

The same applies to the __subclasshook__ property.

This does seem like a bug to me.

[MarcoGorelli]

yup, agree