Remove error handling for evaluation errors

lib/producer/core/errors.rb

@@ -2,8 +2,6 @@ module Producer
   module Core
     Error                       = Class.new(StandardError)
     ConditionNotMetError        = Class.new(Error)
-    RecipeEvaluationError       = Class.new(StandardError)
-    TaskEvaluationError         = Class.new(RecipeEvaluationError)
     RemoteCommandExecutionError = Class.new(Error)
   end
 end