Update Adsense to place ads on all devices

The current adsense implementation only places ads on desktop-sized
screens.  This change allows ads of the appropriate size to be
displayed on any device.

fixes #224

src/client/site/mod_page/mod_page.jade

@@ -7,7 +7,6 @@
 
 .content.view__mod_page
     .left
-        .view__adsense
 
     .right
         .about

src/client/site/mod_page/mod_page_controller.coffee

@@ -5,7 +5,6 @@
 # All rights reserved.
 #
 
-AdsenseController   = require '../common/adsense/adsense_controller'
 BaseController      = require '../base_controller'
 Item                = require '../../models/game/item'
 ItemGroupController = require '../common/item_group/item_group_controller'
@@ -66,8 +65,6 @@ module.exports = class ModPageController extends BaseController
     # BaseController Overrides #####################################################################
 
     onDidRender: ->
-        @_adsenseController = @addChild AdsenseController, '.view__adsense', model: 'skyscraper'
-
         @$author             = @$('.about .author')
         @$description        = @$('.about .description')
         @$documentationLink  = @$('.about .documentation')