either.rb in rumonade-0.2.1

- old
+ new

@@ -1,5 +1,4 @@
-require 'singleton'
 require 'rumonade/monad'
 
 module Rumonade
   # Represents a value of one of two possible types (a disjoint union).
   # The data constructors {Rumonade::Left} and {Rumonade::Right} represent the two possible values.
\ No newline at end of file