MAINT: clean up Sphinx configuration (#370) #269

Job	Run time
pytest / Determine job matrix	4s
style / Determine skipped pre-commit hooks	9s
doc / nb / Execute and build documentation	1m 41s
doc / linkcheck / Check external links	1m 30s
pytest / Run unit tests (3.10, ubuntu-22.04)	1m 0s
pytest / Run unit tests (3.11, ubuntu-22.04)	54s
pytest / Run unit tests (3.12, ubuntu-22.04)	1m 1s
pytest / Run unit tests (3.7, ubuntu-22.04)	1m 4s
pytest / Run unit tests (3.9, ubuntu-22.04)	1m 2s
pytest / Run unit tests (3.8, ubuntu-22.04, ampform)	1m 59s
pytest / Run unit tests (3.9, macos-12)	1m 45s
style / Run taplo through pre-commit	22s
style / Run local pre-commit hooks	1m 42s
doc / Upload to GitHub Pages	0s
style / Push changes	0s
	14m 13s

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