class Placement < ActiveRecord::Base
  belongs_to :couple
  belongs_to :event
end

class Placement < ActiveRecord::Base
  belongs_to :couple
  belongs_to :event

  # Returns a string representation of the rank suitable for display to the
  # user. Present to match the signature of {SubPlacement::rank_to_s}
  def rank_to_s
    rank.to_s
  end
end

--- 
+++ 
@@ -1,10 +1,4 @@
 class Placement < ActiveRecord::Base
   belongs_to :couple
   belongs_to :event
-
-  # Returns a string representation of the rank suitable for display to the
-  # user. Present to match the signature of {SubPlacement::rank_to_s}
-  def rank_to_s
-    rank.to_s
-  end
 end
Remove unused `rank_to_s` from `Placement`

This was from when I was still figuring out the appropriate interface
for converting the rank.
