Chore: Fix tox verify

Chore: Fix tox verify

- Rm all acumos resources on the infra is decomissioned.
- Rm Nexus fd.io is decommissioned.
- Update pre-commit deps
  gitlint v4.0.1 -> v4.3.0.
  black v0.15.1 -> v0.17.0.
  flake8 updating 21.9b0 -> 22.6.0.
  bandit 1.7.0 -> 1.7.4.
  write-good v1.0.4 -> v1.0.8.
- Reword docs to address write-good warnings
- Set default language to 'en'

Fixes the following Sphinx warning (treated as error) starting
with 5.0 release:

Warning, treated as error: Invalid configuration value found:
'language = None'. Update your configuration to a valid langauge
code. Falling back to 'en' (English).

Signed-off-by: Anil Belur <abelur@linuxfoundation.org>
Change-Id: I838a8743ab556906b01112ad6805bc92c1fc3161