Remove unused code.

app/controllers/admin/announcements_controller.rb

@@ -192,7 +192,7 @@ class Admin::AnnouncementsController < OrbitAdminController
           if File.exist?(filename)
             @thread.update(:status=>{:status=>'finish','finish_percent'=>100,'info'=>I18n.t('announcement.read_from_cache')})
           else
-            excel_contents = render_to_string( handlers: [:axlsx], formats: [:xlsx] ,partial: 'export_excel.xlsx',locals: {:@announcements=>@announcements,:@thread=>@thread, :@host=>@host} )
+            excel_contents = render_to_string( handlers: [:axlsx], formats: [:xlsx] ,partial: 'export_excel.xlsx' )
             File.open(filename, 'w') do |f|
               f.write excel_contents
             end