simplemerge: delete unused find_unconflicted()
The function has been unused ever since it was introduced in
465b9ea02868 (Import 3-way merge code from bzr, 2007-04-16).
Differential Revision: https://phab.mercurial-scm.org/D9832
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true