Merge pull request #531 from nobu/simplify #132

Job	Run time
ruby-versions / Generate Ruby versions	2s
ubuntu-20.04 2.3	1m 20s
ubuntu-20.04 2.4	1m 40s
ubuntu-20.04 2.5	1m 20s
ubuntu-20.04 2.6	1m 21s
ubuntu-20.04 2.7	1m 27s
ubuntu-20.04 3.0	36s
ubuntu-20.04 3.1	44s
ubuntu-20.04 3.2	32s
ubuntu-20.04 head	33s
ubuntu-20.04 jruby	1m 51s
ubuntu-20.04 jruby-head	1m 52s
ubuntu-20.04 truffleruby	1m 7s
ubuntu-20.04 truffleruby-head	1m 20s
ubuntu-22.04 2.3	1m 22s
ubuntu-22.04 2.4	1m 10s
ubuntu-22.04 2.5	1m 25s
ubuntu-22.04 2.6	1m 25s
ubuntu-22.04 2.7	1m 26s
ubuntu-22.04 3.0	36s
ubuntu-22.04 3.1	36s
ubuntu-22.04 3.2	33s
ubuntu-22.04 head	38s
ubuntu-22.04 jruby	1m 40s
ubuntu-22.04 jruby-head	1m 28s
ubuntu-22.04 truffleruby	1m 9s
ubuntu-22.04 truffleruby-head	1m 26s
macos-11 2.3	2m 37s
macos-11 2.4	4m 45s
macos-11 2.5	2m 2s
macos-11 2.6	2m 14s
macos-11 2.7	4m 53s
macos-11 3.0	40s
macos-11 3.1	38s
macos-11 3.2	37s
macos-11 head	38s
macos-11 jruby	1m 16s
macos-11 jruby-head	1m 24s
macos-11 truffleruby	2m 6s
macos-11 truffleruby-head	1m 42s
macos-12 2.3	2m 31s
macos-12 2.4	4m 11s
macos-12 2.5	2m 13s
macos-12 2.6	2m 16s
macos-12 2.7	2m 17s
macos-12 3.0	42s
macos-12 3.1	45s
macos-12 3.2	48s
macos-12 head	40s
macos-12 jruby	2m 14s
macos-12 jruby-head	2m 12s
macos-12 truffleruby	1m 46s
macos-12 truffleruby-head	2m 37s
windows-latest 2.3	3m 27s
windows-latest 2.4	3m 11s
windows-latest 2.5	5m 12s
windows-latest 2.6	5m 48s
windows-latest 2.7	3m 50s
windows-latest 3.0	2m 28s
windows-latest 3.1	3m 5s
windows-latest 3.2	1m 23s
windows-latest head	2m 14s
ubuntu-latest jruby-9.1	2m 33s
ubuntu-latest jruby-9.2	1m 54s
ubuntu-latest jruby-9.3	1m 22s
	1h 57m 50s

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