Remove unused Cleanup() call

It was used to clean up shared memory.  We don't construct that anymore,
so remove the useless call.

Change-Id: I8087cef2afce184f66721a9995a63053fb278ec7
diff --git a/aos/events/logging/log_stats.cc b/aos/events/logging/log_stats.cc
index 8243d9f..eac8d08 100644
--- a/aos/events/logging/log_stats.cc
+++ b/aos/events/logging/log_stats.cc
@@ -183,6 +183,6 @@
 
   // Cleanup the created processes
   reader.Deregister();
-  aos::Cleanup();
+
   return 0;
 }