--- a/dom/media/systemservices/MediaUtils.h
+++ b/dom/media/systemservices/MediaUtils.h
@@ -526,17 +526,16 @@ typename MozPromise<ResolveValueType,
                     RejectValueType,
                     true>::AllPromiseType::ResolveOrRejectValue
 AwaitAll(already_AddRefed<nsIEventTarget> aPool,
          nsTArray<RefPtr<MozPromise<ResolveValueType, RejectValueType, true>>>&
            aPromises)
 {
   typedef MozPromise<ResolveValueType, RejectValueType, true> Promise;
   RefPtr<nsIEventTarget> pool = aPool;
-  RefPtr<TaskQueue> t = new TaskQueue(do_AddRef(pool));
   RefPtr<AutoTaskQueue> taskQueue = new AutoTaskQueue(do_AddRef(pool));
   RefPtr<typename Promise::AllPromiseType> p =
     Promise::All(taskQueue, aPromises);
   return Await(pool.forget(), p);
 }
 
 } // namespace media
 } // namespace mozilla