Revert "[exporter/prometheusremotewriteexporter]chore: log warning ab…

…out remote_write_queue.num_consumers being a no-op" (open-telemetry#35845)

Reverts open-telemetry#34993

exporter/prometheusremotewriteexporter/README.md

@@ -54,7 +54,7 @@ The following settings can be optionally configured:
 - `remote_write_queue`: fine tuning for queueing and sending of the outgoing remote writes.
   - `enabled`: enable the sending queue (default: `true`)
   - `queue_size`: number of OTLP metrics that can be queued. Ignored if `enabled` is `false` (default: `10000`)
-  - `num_consumers`: minimum number of workers to use to fan out the outgoing requests. (default: `5`) **WARNING:** Currently, num_consumers doesn't have any effect due to incompatibility with Prometheus remote write API. The value will be ignored. Please see https://github.com/open-telemetry/opentelemetry-collector/issues/2949 for more information.
+  - `num_consumers`: minimum number of workers to use to fan out the outgoing requests. (default: `5`)
 - `resource_to_telemetry_conversion`
   - `enabled` (default = false): If `enabled` is `true`, all the resource attributes will be converted to metric labels by default.
 - `target_info`: customize `target_info` metric

exporter/prometheusremotewriteexporter/factory.go

@@ -42,10 +42,6 @@ func createMetricsExporter(ctx context.Context, set exporter.Settings,
 		return nil, errors.New("invalid configuration")
 	}
 
-	if prwCfg.RemoteWriteQueue.NumConsumers != 0 {
-		set.Logger.Warn("Currently, remote_write_queue.num_consumers doesn't have any effect due to incompatibility with Prometheus remote write API. The value will be ignored. Please see https://github.com/open-telemetry/opentelemetry-collector/issues/2949 for more information.")
-	}
-
 	prwe, err := newPRWExporter(prwCfg, set)
 	if err != nil {
 		return nil, err