Remove message fee + message send calls (#1642)

* remove message fee

* it is compiling!

* fixes + fmt

* more cleanup

* more cleanup

* restore MessageDeliveryAndDispatchPayment since we'll need relayer rewards

* started rational relayer removal

* more removal

* removed estimate fee subcommand

* remove DispatchFeePayment

* more removals

* removed conversion rates && some metrics

* - unneeded associated type

* - OutboundMessageFee

* fix benchmarks compilation

* fmt

* test + fix benchmarks

* fix send message

* clippy

bridges/relays/bin-substrate/src/cli/bridge.rs

@@ -15,7 +15,6 @@
 // along with Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.
 
 use crate::cli::CliChain;
-use messages_relay::relay_strategy::MixStrategy;
 use pallet_bridge_parachains::{RelayBlockHash, RelayBlockHasher, RelayBlockNumber};
 use parachains_relay::ParachainsPipeline;
 use relay_substrate_client::{AccountKeyPairOf, Chain, ChainWithTransactions, RelayChain};
@@ -46,7 +45,7 @@ impl FullBridge {
 			Self::MillauToRialtoParachain => MILLAU_TO_RIALTO_PARACHAIN_INDEX,
 			Self::RialtoParachainToMillau => RIALTO_PARACHAIN_TO_MILLAU_INDEX,
 			Self::BridgeHubRococoToBridgeHubWococo | Self::BridgeHubWococoToBridgeHubRococo =>
-				unimplemented!("TODO: (bridge_instance_index) do we need it or refactor or remove?"),
+				unimplemented!("Relay doesn't support send-message subcommand on bridge hubs"),
 		}
 	}
 }
@@ -102,9 +101,5 @@ pub trait MessagesCliBridge: CliBridgeBase {
 	/// defined bridge.
 	const ESTIMATE_MESSAGE_FEE_METHOD: &'static str;
 	/// The Source -> Destination messages synchronization pipeline.
-	type MessagesLane: SubstrateMessageLane<
-		SourceChain = Self::Source,
-		TargetChain = Self::Target,
-		RelayStrategy = MixStrategy,
-	>;
+	type MessagesLane: SubstrateMessageLane<SourceChain = Self::Source, TargetChain = Self::Target>;
 }