BlUniverseEvent+4: Unused hierarchy?

[tinchodias]

None of them have references:

BlUniverseEvent allSubclasses >>>
 an OrderedCollection(BlUniverseEventsArrived BlUniverseEventsCleared BlUniverseResumed BlUniverseSuspended)

Also checked in GT image.

[tinchodias]

The BlUniverseEventListener is prepared to handle those events, and all BlParallelUniverse have one instance of this listener, added in initialize.

[tinchodias]

Seems we can remove this code. For the case there is some "hidden" runtime reference, I tried with Halts on each of the listener's handlers and opened the Spec-Brick example. I also tried with both Bloc hosts.