* json.py cleaning from outdated libs
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
* 1. Removed cjson and simplejson from documentation, as those libraries aren't supported anymore
2. Removed _json_extra_kwargs from json.py
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>