No longer needed in the world of MyST Parser.

Namely: https://docs.readthedocs.io/en/stable/config-file/v2.html

Per https://github.com/executablebooks/MyST-Parser/issues/155#issuecomment-638020179

This reverts commit fe23fdb9.

all that is to say, give us a sense of purpose

Thanks to https://github.com/readthedocs/recommonmark/issues/189#issuecomment-637440853
comment by chrisjsewell

See https://python-markdown.github.io/extensions/admonition/

Incorporate link into text and soften implication that cooperatives and cooperative principles began in England in 1844

https://github.com/readthedocs/recommonmark/issues/88