diff --git a/src/CoreBundle/Serializer/UserToJsonNormalizer.php b/src/CoreBundle/Serializer/UserToJsonNormalizer.php
index 884b7747a3..9a712a04f5 100644
--- a/src/CoreBundle/Serializer/UserToJsonNormalizer.php
+++ b/src/CoreBundle/Serializer/UserToJsonNormalizer.php
@@ -39,12 +39,10 @@ use Chamilo\CourseBundle\Entity\CStudentPublication;
 use Chamilo\CourseBundle\Entity\CStudentPublicationComment;
 use Chamilo\CourseBundle\Entity\CSurveyAnswer;
 use Chamilo\CourseBundle\Entity\CWiki;
-use DateTime;
 use DateTimeInterface;
 use Doctrine\ORM\EntityManager;
 use SocialManager;
 use Symfony\Component\Serializer\Normalizer\AbstractNormalizer;
-use Symfony\Component\Serializer\Normalizer\GetSetMethodNormalizer;
 use Symfony\Component\Serializer\SerializerInterface;
 
 final class UserToJsonNormalizer