Zap-Trace-Span is probably not used anymore

[gianarb]

If I remember well the Zap-Trace-Span is something added when we tried tracing via logs.
Are we sure this is still usual? It is a requirement we expose via API and via Swagger, so it means documentation and generated code as a consequence.

@nathanielc were you involved?

[nathanielc]

Yeah its not used anymore to me knowledge.