remove unnecessary changes, already handled in another PR

Author: haristku

SystemSettings.php

@@ -216,7 +216,7 @@ private function createNumberOfQueueWorkerSetting()
             $field->uiControlAttributes = array('size' => 5);
             $field->inlineHelp = Piwik::translate('QueuedTracking_NumberOfQueueWorkersFieldHelp') . '</br>';
             $this->assignValueIsIntValidator($field);
-            $field->validators[] = new NumberRange(1, 4096);
+            $field->validators[] = new NumberRange(1, 16);
         });
 
         $this->addSetting($numQueueWorkers);