Extracted Splashpage from Conference

#418

app/views/admin/sponsors/index.html.haml

@@ -1,6 +1,5 @@
 .row
   .col-md-8
     = semantic_form_for(@conference, :url => admin_conference_sponsor_path(@conference.short_title, @conference.sponsors)) do |f|
-      = f.input :include_sponsors_in_splash, hint: 'On setting this true you will enable the sponsors to be displayed on the splash page'
       = dynamic_association :sponsors, "Sponsors", f
       = f.action :submit, :as => :button, :button_html => {:class => "btn btn-primary"}