Remove deprecated options in `[tool.darker]` #2389

Job	Run time
build-wheel	8s
test-nixos (ubuntu-latest)	1m 6s
build-sdist-validate-dists	10s
test-nixos (macos-latest)	2m 3s
test (ubuntu-latest, 3.8)	40s
test (ubuntu-latest, 3.9)	58s
test (ubuntu-latest, 3.10)	34s
test (ubuntu-latest, 3.11)	31s
test (ubuntu-latest, 3.12)	38s
test (ubuntu-latest, 3.13-dev)	49s
test (windows-latest, 3.8)	3m 34s
test (windows-latest, 3.9)	2m 56s
test (windows-latest, 3.10)	3m 12s
test (windows-latest, 3.11)	3m 6s
test (windows-latest, 3.12)	3m 9s
test (macos-latest, 3.8)	1m 20s
test (macos-latest, 3.9)	58s
test (macos-latest, 3.10)	44s
test (macos-latest, 3.11)	49s
test (macos-latest, 3.12)	47s
test (ubuntu-latest, 3.8, --constraint constraints-oldest.txt)	45s
test (ubuntu-latest, 3.12, pip uninstall -y -r constraints-future.txt ; pip install -r constraint...	44s
	29m 41s

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