Forgot to remove old use statement

dennisdegreef · dennisdegreef · commit 985755b0ccda · 2015-02-13T01:16:20.000+01:00
diff --git a/lib/Github/Api/Notification.php b/lib/Github/Api/Notification.php
@@ -3,7 +3,6 @@
 namespace Github\Api;
 
 use DateTime;
-use DateTimeInterface;
 
 /**
  * API for accessing Notifications from your Git/Github repositories.
