Remove not needed replication listener in docker compose example

[dklimpel]

See: #14077 (comment)

I think the replication listener in #12737 is unnecessary. The list of federation senders is stored in WorkerConfig.federation_shard_config, and nothing seems to send out replication requests based off of it.

fyi: @Thumbscrew

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Signed-off-by: Dirk Klimpel dirk@klimpel.org

[dklimpel]

An instance_map is only is required for stream writers.
See also:

synapse/docker/configure_workers_and_start.py

Lines 275 to 286 in 1bf2832

	elif worker_type == "event_persister":
	# Event persisters write to the events stream, so we need to update
	# the list of event stream writers
	shared_config.setdefault("stream_writers", {}).setdefault("events", []).append(
	worker_name
	)
	# Map of stream writer instance names to host/ports combos
	instance_map[worker_name] = {
	"host": "localhost",
	"port": worker_port,
	}

Stream writers are not part of this example and explanation and need some more configuration eg stream_writers.