Apply suggestion from @dobrac

Co-authored-by: Jakub Dobry <jakub.dobry8@gmail.com>

Author: wj-e2b

iac/modules/job-otel-collector/configs/otel-collector.yaml

@@ -531,13 +531,6 @@ service:
       exporters:
         - clickhouse
 %{ if enable_otel_router_metrics }
-    metrics/external/otel_router:
-      receivers:
-        - otlp
-      processors:
-        - filter/external_metrics
-        - batch
-      exporters:
         - otlp/otel_router
 %{ endif }
     traces: