chore(server/v2/cometbft): simplify getProtoRegistry (backport #22248) (

#22260)

Co-authored-by: Hoa Nguyen <hoa@notional.ventures>
Co-authored-by: Julien Robert <julien@rbrt.fr>

server/v2/cometbft/abci.go

@@ -108,7 +108,7 @@ func NewConsensus[T transaction.Tx](
 		indexedEvents:          indexedEvents,
 		initialHeight:          0,
 		queryHandlersMap:       queryHandlersMap,
-		getProtoRegistry:       sync.OnceValues(func() (*protoregistry.Files, error) { return gogoproto.MergedRegistry() }),
+		getProtoRegistry:       sync.OnceValues(gogoproto.MergedRegistry),
 	}
 }