persistent-nodemap: drop the storage.revlog.nodemap.mode config
We now have a new, better, higher level, option. So we can drop the older one as
planned.
Differential Revision: https://phab.mercurial-scm.org/D9763
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true