Remove uneeded document and image initializations

app/controllers/admin/poll/questions_controller.rb

@@ -31,7 +31,6 @@ class Admin::Poll::QuestionsController < Admin::Poll::BaseController
   end
 
   def show
-    @document = Document.new(documentable: @question)
   end
 
   def edit

app/controllers/budgets/investments_controller.rb

@@ -44,8 +44,6 @@ module Budgets
       set_comment_flags(@comment_tree.comments)
       load_investment_votes(@investment)
       @investment_ids = [@investment.id]
-      @document = Document.new(documentable: @investment)
-      @image = Image.new(imageable: @investment)
     end
 
     def create

app/controllers/polls/questions_controller.rb

@@ -10,8 +10,6 @@ class Polls::QuestionsController < ApplicationController
     @comment_tree = CommentTree.new(@commentable, params[:page], @current_order)
     set_comment_flags(@comment_tree.comments)
 
-    @document = Document.new(documentable: @question)
-
     question_answer = @question.answers.where(author_id: current_user.try(:id)).first
     @answers_by_question_id = {@question.id => question_answer.try(:answer)}
   end

app/controllers/proposals_controller.rb

@@ -19,8 +19,6 @@ class ProposalsController < ApplicationController
   def show
     super
     @notifications = @proposal.notifications
-    @document = Document.new(documentable: @proposal)
-    @image = Image.new(imageable: @proposal)
     redirect_to proposal_path(@proposal), status: :moved_permanently if request.path != proposal_path(@proposal)
   end