Revert "php style fixes"

This reverts commit 38fcccfd83.

src/Bundle/ChillPersonBundle/Entity/Person.php

@@ -1409,6 +1409,9 @@ class Person implements HasCenterInterface, TrackCreationInterface, TrackUpdateI
         return $this;
     }
 
+    /**
+     * @param \DateTime $birthdate
+     */
     public function setBirthdate(?\DateTime $birthdate): self
     {
         $this->birthdate = $birthdate;