DynamicBundle::Effect is now (almost) vestigial #20979
Description
Does it still make sense to have Effect as an associated type here? It doesn't seem like it actually gets used, apart from the NoBundleEffect trait bound, which could be moved to Self. We should certainly leave it there for now to make this change smaller, but we may want to remove it as a follow up.
Originally posted by @chescock in #20772 (comment)