grandpa: remove light-client specific block import pipeline (#7546)

* grandpa: remove light-client specific block import

* consensus, network: remove finality proofs

substrate/primitives/consensus/common/src/import_queue.rs

@@ -34,7 +34,7 @@ use crate::{
 	error::Error as ConsensusError,
 	block_import::{
 		BlockImport, BlockOrigin, BlockImportParams, ImportedAux, JustificationImport, ImportResult,
-		BlockCheckParams, FinalityProofImport,
+		BlockCheckParams,
 	},
 	metrics::Metrics,
 };
@@ -56,11 +56,6 @@ pub type BoxBlockImport<B, Transaction> = Box<
 /// Shared justification import struct used by the queue.
 pub type BoxJustificationImport<B> = Box<dyn JustificationImport<B, Error=ConsensusError> + Send + Sync>;
 
-/// Shared finality proof import struct used by the queue.
-pub type BoxFinalityProofImport<B> = Box<
-	dyn FinalityProofImport<B, Error = ConsensusError> + Send + Sync
->;
-
 /// Maps to the Origin used by the network.
 pub type Origin = libp2p::PeerId;
 
@@ -115,15 +110,6 @@ pub trait ImportQueue<B: BlockT>: Send {
 		number: NumberFor<B>,
 		justification: Justification
 	);
-	/// Import block finality proof.
-	fn import_finality_proof(
-		&mut self,
-		who: Origin,
-		hash: B::Hash,
-		number: NumberFor<B>,
-		finality_proof: Vec<u8>
-	);
-
 	/// Polls for actions to perform on the network.
 	///
 	/// This method should behave in a way similar to `Future::poll`. It can register the current
@@ -146,19 +132,6 @@ pub trait Link<B: BlockT>: Send {
 	fn justification_imported(&mut self, _who: Origin, _hash: &B::Hash, _number: NumberFor<B>, _success: bool) {}
 	/// Request a justification for the given block.
 	fn request_justification(&mut self, _hash: &B::Hash, _number: NumberFor<B>) {}
-	/// Finality proof import result.
-	///
-	/// Even though we have asked for finality proof of block A, provider could return proof of
-	/// some earlier block B, if the proof for A was too large. The sync module should continue
-	/// asking for proof of A in this case.
-	fn finality_proof_imported(
-		&mut self,
-		_who: Origin,
-		_request_block: (B::Hash, NumberFor<B>),
-		_finalization_result: Result<(B::Hash, NumberFor<B>), ()>,
-	) {}
-	/// Request a finality proof for the given block.
-	fn request_finality_proof(&mut self, _hash: &B::Hash, _number: NumberFor<B>) {}
 }
 
 /// Block import successful result.