Test cleanup

src/tests/tracing/eventlistener/eventlistenerenabledisable.cs

@@ -70,11 +70,8 @@ public void Dispose(bool disableEvents)
         }
     }
 
-    class EventPipeSmoke
+    class EventListenerEnableDisableTest
     {
-        private static int messageIterations = 100;
-        private static readonly DateTime ThePast = DateTime.UtcNow;
-
         static int Main()
         {
             bool pass = false;