dirstatemap: remove `_insert_entry`
This was needed as a compatibility layer for the Python and Rust
implementations, but it is not called from anywhere in Rust anymore.
The two remaining calls have been inlined.
Differential Revision: https://phab.mercurial-scm.org/D12501
[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