Revert "[ruby/rdoc] Update test libraries from ruby/ruby 2023-04-29"
This reverts commit 966f0d91e2a86fa1347cdafbe1af47e7350aa4ca.
Revert "[ruby/rdoc] Update test libraries from ruby/ruby 2023-04-29"
This reverts commit 966f0d91e2a86fa1347cdafbe1af47e7350aa4ca.