Fix Rails/Delegate rubocop issue

.rubocop_todo.yml

@@ -365,12 +365,6 @@ Performance/RedundantMatch:
     - 'app/controllers/valuation/spending_proposals_controller.rb'
     - 'app/helpers/embed_videos_helper.rb'
 
-# Offense count: 1
-# Cop supports --auto-correct.
-Rails/Delegate:
-  Exclude:
-    - 'app/models/poll/question.rb'
-
 # Offense count: 5
 # Cop supports --auto-correct.
 # Configuration parameters: Whitelist.

app/models/poll/question.rb

@@ -58,9 +58,7 @@ class Poll::Question < ActiveRecord::Base
     end
   end
 
-  def answerable_by?(user)
-    poll.answerable_by?(user)
-  end
+  delegate :answerable_by?, to: :poll
 
   def self.answerable_by(user)
     return none if user.nil? || user.unverified?