Companion for Substrate#14214 (#7283)

* Companion for Substrate#14214

https://github.com/paritytech/substrate/pull/14214

* update lockfile for {"substrate"}

---------

Co-authored-by: parity-processbot <>

polkadot/runtime/rococo/src/lib.rs

@@ -1282,12 +1282,9 @@ impl pallet_beefy::Config for Runtime {
 		pallet_beefy::EquivocationReportSystem<Self, Offences, Historical, ReportLongevity>;
 }
 
-type MmrHash = <Keccak256 as sp_runtime::traits::Hash>::Output;
-
 impl pallet_mmr::Config for Runtime {
 	const INDEXING_PREFIX: &'static [u8] = mmr::INDEXING_PREFIX;
 	type Hashing = Keccak256;
-	type Hash = MmrHash;
 	type OnNewRoot = pallet_beefy_mmr::DepositBeefyDigest<Runtime>;
 	type WeightInfo = ();
 	type LeafData = pallet_beefy_mmr::Pallet<Runtime>;