Remove poll votation types

Unfortunately this feature wasn't properly reviewed and tested, and it
had many bugs, some of them critical and hard to fix, like validations
being skipped in concurrent requests.

So we're removing it before releasing version 1.1. We might add it back
in the future if we manage to solve the critical issues.

This commit reverts commit 836f9ba7.

app/controllers/admin/poll/questions_controller.rb

@@ -22,7 +22,6 @@ class Admin::Poll::QuestionsController < Admin::Poll::BaseController
 
   def create
     @question.author = @question.proposal&.author || current_user
-    @question.votation_type = VotationType.build_by_type(@question, params[:votation_type])
 
     if @question.save
       redirect_to admin_question_path(@question)
@@ -54,18 +53,11 @@ class Admin::Poll::QuestionsController < Admin::Poll::BaseController
     redirect_to admin_questions_path, notice: notice
   end
 
-  def get_options_traductions
-    render json: {
-      traduction: t("polls.index.descriptions.#{VotationType.enum_types.key params[:enum_type].to_i}")
-    }
-  end
-
   private
 
     def question_params
       attributes = [:poll_id, :question, :proposal_id]
-      params.require(:poll_question).permit(*attributes, translation_params(Poll::Question),
-        :votation_type, :max_votes, :prioritization_type, :max_groups_answers)
+      params.require(:poll_question).permit(*attributes, translation_params(Poll::Question))
     end
 
     def search_params