Cleanup #930

Job	Run time
lint-opam	3m 3s
build-and-test (ubuntu-latest, 4.08, true)	2m 26s
build-and-test (ubuntu-latest, 4.08, false)	2m 14s
build-and-test (ubuntu-latest, 4.09, true)	2m 26s
build-and-test (ubuntu-latest, 4.09, false)	2m 17s
build-and-test (ubuntu-latest, 4.10, true)	2m 20s
build-and-test (ubuntu-latest, 4.10, false)	2m 8s
build-and-test (ubuntu-latest, 4.11, true)	2m 19s
build-and-test (ubuntu-latest, 4.11, false)	2m 5s
build-and-test (ubuntu-latest, 4.12, true)	2m 19s
build-and-test (ubuntu-latest, 4.12, false)	2m 13s
build-and-test (ubuntu-latest, 4.13, true)	2m 17s
build-and-test (ubuntu-latest, 4.13, false)	2m 7s
build-and-test (ubuntu-latest, 4.14, true)	2m 13s
build-and-test (ubuntu-latest, 4.14, false)	2m 5s
build-and-test (ubuntu-latest, 5.0, true)	2m 25s
build-and-test (ubuntu-latest, 5.0, false)	2m 13s
build-and-test (ubuntu-latest, 5.1, true)	2m 31s
build-and-test (ubuntu-latest, 5.1, false)	2m 13s
build-and-test (ubuntu-latest, 5.2, true)	2m 19s
build-and-test (ubuntu-latest, 5.2, false)	2m 6s
build-and-test (ubuntu-latest, ocaml-variants.5.2.0+options,ocaml-option-flambda,ocaml-option-mus...	2m 49s
build-and-test (macos-latest, 5.2, false)	3m 31s
build-and-test (windows-latest, 5.2, false)	5m 50s
	1h 0m 29s

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