fix: Clean up some requires #598

Job	Run time
tests (ubuntu-latest, 2.4, test)	2m 33s
tests (ubuntu-latest, 2.5, test)	2m 8s
tests (ubuntu-latest, 2.6, test)	2m 16s
tests (ubuntu-latest, 2.7, test)	2m 45s
tests (ubuntu-latest, 3.0, test)	1m 48s
tests (ubuntu-latest, 3.1, test)	1m 45s
tests (ubuntu-latest, 3.2, test)	1m 42s
tests (ubuntu-latest, jruby, test)	12m 29s
tests (ubuntu-latest, truffleruby, test)	6m 41s
tests (macos-latest, 2.4, test)	4m 49s
tests (macos-latest, 3.2, test)	3m 2s
tests (windows-latest, 2.4, test)	6m 17s
tests (windows-latest, 3.2, test)	6m 36s
tests (ubuntu-latest, 3.2, rubocop , yardoc , build)	48s
	55m 39s

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