Move AddStatisticsData out of Listener folder since it isn't a listener

extensions/statistics/extend.php

@@ -10,13 +10,13 @@
  */
 
 use Flarum\Extend;
-use Flarum\Statistics\Listener;
+use Flarum\Statistics\AddStatisticsData;
 
 return [
     (new Extend\Frontend('admin'))
         ->js(__DIR__.'/js/dist/admin.js')
         ->css(__DIR__.'/less/admin.less')
-        ->content(Listener\AddStatisticsData::class),
+        ->content(AddStatisticsData::class),
 
     new Extend\Locales(__DIR__.'/locale'),
 ];

extensions/statistics/src/AddStatisticsData.php

@@ -9,7 +9,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Flarum\Statistics\Listener;
+namespace Flarum\Statistics;
 
 use DateTime;
 use DateTimeZone;