rebase: remove now unnecessary logic to allow empty commit when branch changes
This was a workaround for a bug in the empty commit check in repo.commit(),
where the parent branch name was incorrectly compared with the wdir branch name
instead of the branch name passed via `extra`. The bug was fixed in D8724.
The workaround was introduced in
b2415e94b2f5.
Differential Revision: https://phab.mercurial-scm.org/D8725
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true