revert File::Statfs [Feature #9772]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46042 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
revert File::Statfs [Feature #9772]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46042 b2dd03c8-39d4-4d8f-98ff-823fe69b080e