Merge pull request #189 from nobu/remove-deprecated-constants #505

Job	Run time
ruby-versions / Generate Ruby versions	3s
test (2.6 / ubuntu-latest)	35s
test (2.6 / macos-latest)	50s
test (2.6 / windows-latest)	3m 33s
test (2.7 / ubuntu-latest)	35s
test (2.7 / macos-latest)	44s
test (2.7 / windows-latest)	4m 7s
test (3.0 / ubuntu-latest)	24s
test (3.0 / macos-latest)	26s
test (3.0 / windows-latest)	1m 41s
test (3.1 / ubuntu-latest)	23s
test (3.1 / macos-latest)	27s
test (3.1 / windows-latest)	2m 13s
test (3.2 / ubuntu-latest)	20s
test (3.2 / macos-latest)	23s
test (3.2 / windows-latest)	2m 20s
test (3.3 / ubuntu-latest)	20s
test (3.3 / macos-latest)	28s
test (3.3 / windows-latest)	2m 44s
test (head / ubuntu-latest)	21s
test (head / macos-latest)	27s
test (head / windows-latest)	1m 21s
	24m 45s

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