Kill the light client, CHTs and change tries. (#10080)

* Remove light client, change tries and CHTs

* Update tests

* fmt

* Restore changes_root

* Fixed benches

* Cargo fmt

* fmt

* fmt

substrate/client/consensus/aura/src/import_queue.rs

@@ -33,7 +33,7 @@ use sp_api::{ApiExt, ProvideRuntimeApi};
 use sp_block_builder::BlockBuilder as BlockBuilderApi;
 use sp_blockchain::{
 	well_known_cache_keys::{self, Id as CacheKeyId},
-	HeaderBackend, ProvideCache,
+	HeaderBackend,
 };
 use sp_consensus::{CanAuthorWith, Error as ConsensusError};
 use sp_consensus_aura::{
@@ -45,7 +45,8 @@ use sp_core::{crypto::Pair, ExecutionContext};
 use sp_inherents::{CreateInherentDataProviders, InherentDataProvider as _};
 use sp_runtime::{
 	generic::{BlockId, OpaqueDigestItemId},
-	traits::{Block as BlockT, DigestItemFor, Header},
+	traits::{Block as BlockT, Header},
+	DigestItem,
 };
 use std::{fmt::Debug, hash::Hash, marker::PhantomData, sync::Arc};
 
@@ -61,9 +62,8 @@ fn check_header<C, B: BlockT, P: Pair>(
 	hash: B::Hash,
 	authorities: &[AuthorityId<P>],
 	check_for_equivocation: CheckForEquivocation,
-) -> Result<CheckedHeader<B::Header, (Slot, DigestItemFor<B>)>, Error<B>>
+) -> Result<CheckedHeader<B::Header, (Slot, DigestItem)>, Error<B>>
 where
-	DigestItemFor<B>: CompatibleDigestItem<P::Signature>,
 	P::Signature: Codec,
 	C: sc_client_api::backend::AuxStore,
 	P::Public: Encode + Decode + PartialEq + Clone,
@@ -189,14 +189,8 @@ where
 #[async_trait::async_trait]
 impl<B: BlockT, C, P, CAW, CIDP> Verifier<B> for AuraVerifier<C, P, CAW, CIDP>
 where
-	C: ProvideRuntimeApi<B>
-		+ Send
-		+ Sync
-		+ sc_client_api::backend::AuxStore
-		+ ProvideCache<B>
-		+ BlockOf,
+	C: ProvideRuntimeApi<B> + Send + Sync + sc_client_api::backend::AuxStore + BlockOf,
 	C::Api: BlockBuilderApi<B> + AuraApi<B, AuthorityId<P>> + ApiExt<B>,
-	DigestItemFor<B>: CompatibleDigestItem<P::Signature>,
 	P: Pair + Send + Sync + 'static,
 	P::Public: Send + Sync + Hash + Eq + Clone + Decode + Encode + Debug + 'static,
 	P::Signature: Encode + Decode,
@@ -385,7 +379,6 @@ where
 	C: 'static
 		+ ProvideRuntimeApi<Block>
 		+ BlockOf
-		+ ProvideCache<Block>
 		+ Send
 		+ Sync
 		+ AuxStore
@@ -395,7 +388,6 @@ where
 		+ Send
 		+ Sync
 		+ 'static,
-	DigestItemFor<Block>: CompatibleDigestItem<P::Signature>,
 	P: Pair + Send + Sync + 'static,
 	P::Public: Clone + Eq + Send + Sync + Hash + Debug + Encode + Decode,
 	P::Signature: Encode + Decode,