Use PHP's DateTime instead of our DateTimeFactory in the TimeLineCont…

…roller

I'm about to drop the DateTimeFactory because date_default_timezone_set() in combination w/ PHP's DateTime is sufficient.

refs #6778

modules/monitoring/application/controllers/TimelineController.php

@@ -1,11 +1,8 @@
 <?php
 /* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
 
-use \DateTime;
-use \DateInterval;
 use Icinga\Web\Url;
 use Icinga\Util\Format;
-use Icinga\Util\DateTimeFactory;
 use Icinga\Module\Monitoring\Controller;
 use Icinga\Module\Monitoring\Timeline\TimeLine;
 use Icinga\Module\Monitoring\Timeline\TimeRange;
@@ -233,7 +230,7 @@ private function extrapolateDateTime(DateTime &$dateTime)
      */
     private function buildTimeRanges()
     {
-        $startTime = DateTimeFactory::create();
+        $startTime = new DateTime();
         $startParam = $this->_request->getParam('start');
         $startTimestamp = is_numeric($startParam) ? intval($startParam) : strtotime($startParam);
         if ($startTimestamp !== false) {