tracer: remove support for lightstep
Created by: keegancsmith
This was deprecated in 3.15. Note that this is for sending tracing to lightstep and is unrelated to our Sourcegraph Extension which annotates lightstep tracing code.
Created by: keegancsmith
This was deprecated in 3.15. Note that this is for sending tracing to lightstep and is unrelated to our Sourcegraph Extension which annotates lightstep tracing code.