message: Removing duration_histogram from common/metrics/src/op_counters.rs
  Closes:
  Approved by: bmwill
diff: @@ -96,10 +96,6 @@ impl OpMetrics {
  self.peer_gauges.with_label_values(&[name, remote_peer_id])
  }
  - pub fn duration_histogram(&self, name: &str) -> DurationHistogram {
  - DurationHistogram::new(self.duration_histograms.with_label_values(&[name]))
  - }
  -
  #[inline]
  pub fn inc(&self, op: &str) {
  self.counters.with_label_values(&[op]).inc();
  