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/assets/javascripts/application.js

@@ -87,7 +87,6 @@
 //= require cookies
 //= require columns_selector
 //= require budget_edit_associations
-//= require votations
 
 var initialize_modules = function() {
   "use strict";
@@ -143,9 +142,6 @@ var initialize_modules = function() {
     App.ColumnsSelector.initialize();
   }
   App.BudgetEditAssociations.initialize();
-  if ($("#votation_type_enum_type").length) {
-    App.Votations.initialize();
-  }
 };
 
 $(function() {