Test

[DOC] Remove unnecessary rdoc-ref missing example #1229

Job	Run time
ruby-versions / Generate Ruby versions	3s
test (3.0, ubuntu-latest)	23s
test (3.0, macos-latest)	28s
test (3.0, windows-latest)	1m 20s
test (3.1, ubuntu-latest)	26s
test (3.1, macos-latest)	30s
test (3.1, windows-latest)	2m 11s
test (3.2, ubuntu-latest)	26s
test (3.2, macos-latest)	21s
test (3.2, windows-latest)	1m 28s
test (3.3, ubuntu-latest)	25s
test (3.3, macos-latest)	18s
test (3.3, windows-latest)	3m 5s
test (3.4, ubuntu-latest)	28s
test (3.4, macos-latest)	21s
test (head, ubuntu-latest)	32s
test (head, macos-latest)	21s
test (head, windows-latest)	1m 50s
test (truffleruby, ubuntu-latest)	2m 21s
test (truffleruby, macos-latest)	1m 53s
test (truffleruby-head, ubuntu-latest)	3m 12s
test (truffleruby-head, macos-latest)	2m 35s
	24m 57s

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