tests: remove trailing commas to support PHP 7.1 7.2

Author: phil-davis

tests/VObject/ITip/BrokerUpdateEventTest.php

@@ -958,7 +958,7 @@ public function testExdateTimezone(): void
 DTSTAMP:**ANY**
 END:VEVENT
 END:VCALENDAR
-ICS,
+ICS
             ],
         ];
 
@@ -1048,7 +1048,7 @@ public function testExdateTimezoneUTC(): void
 DTSTAMP:**ANY**
 END:VEVENT
 END:VCALENDAR
-ICS,
+ICS
             ],
         ];