packaging: remove requirements constraints to support Python 2 We just deleted support for Python 2 from the packaging code. We no longer need these package constraints in the requirements file to support Python 2. Differential Revision: https://phab.mercurial-scm.org/D12267

[build-system]
requires = ["setuptools", "wheel"]

[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true