Revert "[ruby/rdoc] Use omit of test-unit instead of skip of minitest"
This reverts commit b4da6fc1c277190bbd10e795ebf3be45772038e8.
make test-all uses minitest, which led to "undefined method `omit'"
make test-all
Revert "[ruby/rdoc] Use omit of test-unit instead of skip of minitest"
This reverts commit b4da6fc1c277190bbd10e795ebf3be45772038e8.
make test-all
uses minitest, which led to "undefined method `omit'"