Remove extra trace facet "launch.resource_name"

[saiatmakuri]

https://docs.datadoghq.com/tracing/metrics/metrics_namespace/

Trace metrics tags, possible tags are: env, service, version, resource, sublayer_type, sublayer_service, http.status_code, http.status_class, Datadog Agent tags (including the host and second primary tag). Note: Tags set on spans do not count and will not be available as tags for your traces metrics.

There already is a resource trace metric tag. launch.resource_name is also a facet that's unused, so it can be removed

[ian-scale]

@saiatmakuri I don't think this is the case, but can you confirm this facet isn't being used for any of our datadog dashboards before we remove it?

[saiatmakuri]

@saiatmakuri I don't think this is the case, but can you confirm this facet isn't being used for any of our datadog dashboards before we remove it?

checked again to confirm, we only use the trace metric resource_name

[yixu34]

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