* test/cgi/test_cgi_core.rb: removed obsoleted condition for Ruby 1.8.
* test/cgi/test_cgi_header.rb: ditto.
* test/cgi/test_cgi_multipart.rb: ditto.
* test/cgi/test_cgi_tag_helper.rb: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47110 b2dd03c8-39d4-4d8f-98ff-823fe69b080e