Revert "Add pipeline operator [Feature #15799]"
This reverts commits:
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/94645
Revert "Add pipeline operator [Feature #15799]"
This reverts commits:
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/94645