Remove runipy from test requirements #356

Job	Run time
initial_checks / Load tox environments	4s
initial_checks / codestyle (ubuntu-latest)	19s
tests / Load tox environments	6s
no_coverage / Load tox environments	4s
no_coverage / py39-notebooks (windows-latest)	3m 3s
no_coverage / py38-notebooks (macos-latest)	2m 2s
no_coverage / py310-notebooks (ubuntu-latest)	1m 39s
no_coverage / py311-docs (ubuntu-latest)	1m 36s
no_coverage / py39-docs (macos-latest)	2m 8s
no_coverage / py38-docs (windows-latest)	2m 52s
tests / py38-test (ubuntu-latest)	2m 4s
tests / py39-test (ubuntu-latest)	2m 1s
tests / py310-test (ubuntu-latest)	2m 4s
tests / py311-test (ubuntu-latest)	2m 0s
tests / py38-test (macos-latest)	3m 39s
tests / py39-test (macos-latest)	3m 28s
tests / py311-test (macos-latest)	4m 0s
tests / py38-test (windows-latest)	3m 49s
tests / py39-test (windows-latest)	3m 59s
tests / py310-test (windows-latest)	3m 41s
publish / Build source and wheel distribution	3m 58s
	48m 36s

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