chore(tracing): Cleanup remanants of old tracing infrastructure #4294

sfleen wants to merge 1 commit intosfleen/tracing-upstream-processorlinkerd/linkerd2-proxy:sfleen/tracing-upstream-processorfrom

sfleen/tracing-upstream-cleanuplinkerd/linkerd2-proxy:sfleen/tracing-upstream-cleanupCopy head branch name to clipboard