DRY up bootstrapSwitches with default values

app/views/admin/conferences/_recent_users.html.haml

@@ -15,11 +15,9 @@
             %td= user.created_at.strftime('%m/%d/%Y')
             %td
               = check_box_tag user.id, user.id, user.confirmed?,
-                method: :patch,
                 url: "/admin/users/#{user.id}/toggle_confirmation?user[to_confirm]=",
                 class: 'switch-checkbox',
-                readonly: true,
-                data: { size: 'small', on_color: 'success', off_color: 'warning', on_text: 'Yes', off_text: 'No' }
+                readonly: true
 - else
   %h5.text-warning.text-center
     No sign ups!