streamingccl: remove unnecessary error check

This err was already checked above.

Release note: None

pkg/ccl/streamingccl/streamingest/stream_ingestion_processor.go

@@ -246,10 +246,6 @@ func (sip *streamIngestionProcessor) Start(ctx context.Context) {
 			streamClient = sip.forceClientForTests
 			log.Infof(ctx, "using testing client")
 		} else {
-			if err != nil {
-				sip.MoveToDraining(errors.Wrapf(err, "creating client for partition spec %q from %q", spec, addr))
-				return
-			}
 			streamClient, err = streamclient.NewStreamClient(streamingccl.StreamAddress(addr))
 			if err != nil {
 				sip.MoveToDraining(errors.Wrapf(err, "creating client for partition spec %q from %q", spec, addr))
@@ -259,11 +255,11 @@ func (sip *streamIngestionProcessor) Start(ctx context.Context) {
 		}
 
 		sub, err := streamClient.Subscribe(ctx, streaming.StreamID(sip.spec.StreamID), spec, sip.spec.StartTime)
-		subscriptions[id] = sub
 		if err != nil {
 			sip.MoveToDraining(errors.Wrapf(err, "consuming partition %v", addr))
 			return
 		}
+		subscriptions[id] = sub
 		sip.cg.GoCtx(sub.Subscribe)
 	}
 	sip.eventCh = sip.merge(ctx, subscriptions)