Warning message in logs if both log-correlation and tracing disabled

If both log-correlation and tracing is set to false, intercontainer message decode will output a warning message similar to the following to the log (output from pkg/kafka/kafka_inter_container_library.go (func: enrichContextWithSpan)

My assumption is that the no-op tracer or something similar to this is responsible. 

{{ "level": "warn",}}
{{ "ts": "2021-02-18T18:43:19.220Z",}}
{{ "caller": "kafka/kafka_inter_container_library.go:827",}}
{{ "msg": "unable-to-deserialize-textmap-to-span",}}
{{ "instanceId": "voltha-voltha-rw-core-75459897b6-6zsbn",}}
{{ "textMap": {}}
{{ "uber-trace-id": "506d336dee479aa9:306a01214ae7db6b:0:0",}}
{{ "uberctx-op-name": "kafka-rpc-DeviceStateUpdate",}}
{{ "uberctx-rpc-span-name": "kafka-rpc-DeviceStateUpdate"}}
{{ },}}
{{ "error": "opentracing: SpanContext not found in Extract carrier",}}
{{ "stacktrace": "github.com/opencord/voltha-lib-..."}}
{{ },}}