Delete out of date docs, drivers and examples

[tannewt]

Docs are test rendered here: https://tannewt-circuitpython.readthedocs.io/en/delete_out_of_date/

[willingc]

Absolutely beautiful @tannewt. Did an in-depth review of rendered docs. Skimmed the code.

[willingc]

Leaving for @dhalbert's eagle eyes before merge.

[dhalbert]

When I do a search in https://tannewt-circuitpython.readthedocs.io/en/delete_out_of_date/ for things like busio or DigitalInOut, they don't show up, and I can't find them in the left sidebar. Is that build OK?

[dhalbert]

Great! Just the one question.

[tannewt]

That build was getting the wrong conf.py. I cleared up everything and it looks better. https://tannewt-circuitpython.readthedocs.io/en/delete_out_of_date/docs/index.html

This changed some too: https://tannewt-circuitpython.readthedocs.io/en/delete_out_of_date/docs/library/index.html

[dhalbert]

Great!