Remove dispatch_result field (#1660)

* remove dispatch_result field

* fix benchmarks

bridges/modules/messages/src/mock.rs

@@ -19,7 +19,6 @@
 
 use crate::{calc_relayers_rewards, Config};
 
-use bitvec::prelude::*;
 use bp_messages::{
 	source_chain::{LaneMessageVerifier, MessageDeliveryAndDispatchPayment, TargetHeaderChain},
 	target_chain::{
@@ -394,7 +393,6 @@ pub const fn message_payload(id: u64, declared_weight: u64) -> TestPayload {
 /// Returns message dispatch result with given unspent weight.
 pub const fn dispatch_result(unspent_weight: u64) -> MessageDispatchResult {
 	MessageDispatchResult {
-		dispatch_result: true,
 		unspent_weight: Weight::from_ref_time(unspent_weight),
 		dispatch_fee_paid_during_dispatch: true,
 	}
@@ -406,18 +404,7 @@ pub fn unrewarded_relayer(
 	end: MessageNonce,
 	relayer: TestRelayer,
 ) -> UnrewardedRelayer<TestRelayer> {
-	UnrewardedRelayer {
-		relayer,
-		messages: DeliveredMessages {
-			begin,
-			end,
-			dispatch_results: if end >= begin {
-				bitvec![u8, Msb0; 1; (end - begin + 1) as _]
-			} else {
-				Default::default()
-			},
-		},
-	}
+	UnrewardedRelayer { relayer, messages: DeliveredMessages { begin, end } }
 }
 
 /// Run pallet test.