Delete sleep_sort.py (TheAlgorithms#2352)

* Delete sleep_sort.py

A silly algorithm designed to waste time.  TheAlgorithms#2350 demonstrates that it is a 20+ second denial of service attack on every Travis CI run that we do.

* fixup! Format Python code with psf/black push

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

Author: 2 people