Remove snakefmt footprints in code

[gordonkoehn]

I tried out the black-like code formatter for snakemake called snakefmt.

It turns out they are having quite some problems with python run directives in the rules.

It was not usable with built tests and pre-commit hooks as it was not reliable - would break the code sometimes.

Issues where reported to the developers yet it does not seem to be too actively maintained.

See

• Intendeation in run directive breaking code - simple declarations snakemake/snakefmt#197 (comment)

I removed it, therefore - but some comments remain to be removed.

These commented-out lines in the requirements and github workflows will be removed here.

[gordonkoehn]

@pawel-czyz FYI, I tried snakefmt - I do not recommend it in the current state. Glad, to have learned pre-commit hooks and GitHub-built actions though.