Comanion for substrate#11136 (#5218)

* Comanion for substrate#11136

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* revert changes in bridge

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

polkadot/node/core/av-store/src/metrics.rs

@@ -35,7 +35,6 @@ pub struct Metrics(Option<MetricsInner>);
 impl Metrics {
 	pub(crate) fn on_chunks_received(&self, count: usize) {
 		if let Some(metrics) = &self.0 {
-			use core::convert::TryFrom as _;
 			// assume usize fits into u64
 			let by = u64::try_from(count).unwrap_or_default();
 			metrics.received_availability_chunks_total.inc_by(by);

polkadot/node/core/av-store/src/tests.rs

@@ -16,8 +16,6 @@
 
 use super::*;
 
-use std::convert::TryFrom;
-
 use assert_matches::assert_matches;
 use futures::{channel::oneshot, executor, future, Future};