Remove outdated tracing functions?

[aleksraiden]

Currently we are still using a very early and "older than dirty" module opentracing/opentracing-go (and zipkin). But after version 0.3.5 module was a complete rewrite for better support OpenTelemetry and, in a next - deprecated. See: opentracing/specification#163

So, for a real native support of modern tracing - we need to support OpenTelemetry protocol, but this feature needs to be a complete rewrite.

Perhaps, we can now remove all old code for tracing support and then rewrite it (if they are still needed)?