* lib/test: Removed because ruby's test cases now independent to
  lib/test by r45970. [Feature #9711] [ruby-core:62620]

  I'm still considering about the future of lib/minitest, lib/test.
  (bundling gems?)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45974 b2dd03c8-39d4-4d8f-98ff-823fe69b080e