Remove unused code in App.Cookies

The `removeCookie` function is never called, and the `initialize`
function doesn't do anything. The only functions we use here are
`getCookie` and `saveCookie`.

app/assets/javascripts/application.js

@@ -135,7 +135,6 @@ var initialize_modules = function() {
   App.SendAdminNotificationAlert.initialize();
   App.ModalDownload.initialize();
   App.Settings.initialize();
-  App.Cookies.initialize();
   if ( $('#js-columns-selector').length )
     App.ColumnsSelector.initialize();
   App.BudgetEditAssociations.initialize();

app/assets/javascripts/cookies.js.coffee

@@ -1,8 +1,5 @@
 App.Cookies =
 
-  removeCookie: (name) ->
-    document.cookie("name", null, { path: '/' })
-
   saveCookie: (name, value, days) ->
     expires = undefined
     if days
@@ -24,6 +21,3 @@ App.Cookies =
           c_end = document.cookie.length
         return unescape(document.cookie.substring(c_start, c_end))
     ''
-
-  initialize: ->
-    ''