* test/date/test_date.rb: remove commented-out code.
* test/date/test_date_arith.rb: ditto.
* test/date/test_date_attr.rb: ditto.
* test/date/test_date_parse.rb: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47025 b2dd03c8-39d4-4d8f-98ff-823fe69b080e