Move question most voted answer from boolean to a enumerable max by total_votes

app/controllers/polls/questions_controller.rb

@@ -13,9 +13,6 @@ class Polls::QuestionsController < ApplicationController
     answer.touch if answer.persisted?
     answer.save!
     answer.record_voter_participation(token)
-    @question.question_answers.where(question_id: @question).each do |question_answer|
-      question_answer.set_most_voted
-    end
 
     @answers_by_question_id = { @question.id => params[:answer] }
   end