config: remove now-unused support for "includepaths"
This effectively undoes 081b08e4ea13 (templater: look for mapfiles in
template paths, 2015-05-15).
Differential Revision: https://phab.mercurial-scm.org/D8793
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true