From 8b34fd2c757c43371f1bd3336edd3b6c87fba5ec Mon Sep 17 00:00:00 2001
From: Jack May <jack@solana.com>
Date: Fri, 26 Apr 2019 16:25:13 -0700
Subject: [PATCH] Fix warnings on nightly (#4028)

---
 metrics/src/metrics.rs | 1 -
 1 file changed, 1 deletion(-)

diff --git a/metrics/src/metrics.rs b/metrics/src/metrics.rs
index 8fd374bd3b..a6d9c991e8 100644
--- a/metrics/src/metrics.rs
+++ b/metrics/src/metrics.rs
@@ -223,7 +223,6 @@ pub fn flush() {
 /// Hook the panic handler to generate a data point on each panic
 pub fn set_panic_hook(program: &'static str) {
     use std::panic;
-    use std::sync::{Once, ONCE_INIT};
     static SET_HOOK: Once = ONCE_INIT;
     SET_HOOK.call_once(|| {
         let default_hook = panic::take_hook();