cc-2682: not using pypo time

-Remove messages being sent to pypo to change its timezone
-fix time conversion bug in pypo-push

airtime_mvc/application/models/Preference.php

@@ -264,7 +264,6 @@ class Application_Model_Preference
         Application_Model_Preference::SetValue("timezone", $timezone);
         date_default_timezone_set($timezone);
         $md = array("timezone" => $timezone);
-        RabbitMq::SendMessageToPypo("update_timezone", $md);
     }
     
     public static function GetTimezone(){