Remove currently unnecessary interface

Author: swquinn

src/Sentry/SentryBundle/Event/SentryContextEventInterface.php

@@ -5,7 +5,7 @@
 use Symfony\Component\EventDispatcher\Event;
 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
 
-class SentryUserContextEvent extends Event implements SentryContextEventInterface
+class SentryUserContextEvent extends Event
 {
     private $authenticationToken;