Revert "Keeping Erlang with diagnostics."
Revert "Keeping Erlang with diagnostics."

This reverts commit 172517165a15c7498893c7cf013f98c141647a30.

mattkanwisher/client_golang,asbjornenge/client_golang,KevinPike/client_golang,m3db/prometheus_client_golang,stapelberg/client_golang,telendt/client_golang,jimmidyson/prometheus-client_golang,prometheus/client_golang,fabxc/client_golang