diff --git a/substrate/frame/election-provider-multi-block/src/helpers.rs b/substrate/frame/election-provider-multi-block/src/helpers.rs
index 34491da88898..1d473fa8df09 100644
--- a/substrate/frame/election-provider-multi-block/src/helpers.rs
+++ b/substrate/frame/election-provider-multi-block/src/helpers.rs
@@ -18,17 +18,13 @@
 //! Some helper functions/macros for this crate.
 
 use crate::{
-	types::{
-		AllTargetPagesMinerOf, AllTargetPagesOf, AllVoterPagesMinerOf, AllVoterPagesOf,
-		MaxWinnersPerPageMinerOf, MinerVoterOf, VoterOf,
-	},
-	AccountIdOf, Config, MaxWinnersPerPageOf, SolutionTargetIndexMinerOf, SolutionTargetIndexOf,
-	SolutionVoterIndexMinerOf, SolutionVoterIndexOf,
+	types::{AllTargetPagesMinerOf, AllVoterPagesMinerOf, MaxWinnersPerPageMinerOf, MinerVoterOf},
+	SolutionTargetIndexMinerOf, SolutionVoterIndexMinerOf,
 };
 use frame_election_provider_support::{PageIndex, VoteWeight};
 use frame_support::{traits::Get, BoundedVec};
 use sp_runtime::SaturatedConversion;
-use sp_std::{cmp::Reverse, collections::btree_map::BTreeMap, vec, vec::Vec};
+use sp_std::{cmp::Reverse, collections::btree_map::BTreeMap, vec};
 
 #[macro_export]
 macro_rules! log {
diff --git a/substrate/frame/election-provider-multi-block/src/lib.rs b/substrate/frame/election-provider-multi-block/src/lib.rs
index e20706c8cf56..d49ead75e610 100644
--- a/substrate/frame/election-provider-multi-block/src/lib.rs
+++ b/substrate/frame/election-provider-multi-block/src/lib.rs
@@ -131,12 +131,7 @@ pub use crate::{verifier::Verifier, weights::WeightInfo};
 
 /// Internal crate re-exports to use across benchmarking and tests.
 #[cfg(any(test, feature = "runtime-benchmarks"))]
-use crate::{
-	signed::{Config as ConfigSigned, Pallet as PalletSigned},
-	unsigned::Config as ConfigUnsigned,
-	verifier::{Config as ConfigVerifier, Pallet as PalletVerifier},
-	Config as ConfigCore, Pallet as PalletCore,
-};
+use crate::verifier::Pallet as PalletVerifier;
 
 const LOG_TARGET: &'static str = "runtime::multiblock-election";
 
@@ -773,7 +768,7 @@ impl<T: Config> ElectionProvider for Pallet<T> {
 #[cfg(test)]
 mod phase_transition {
 	use super::*;
-	use crate::{mock::*, verifier::AsyncVerifier};
+	use crate::mock::*;
 
 	use frame_support::assert_ok;
 
diff --git a/substrate/frame/election-provider-multi-block/src/types.rs b/substrate/frame/election-provider-multi-block/src/types.rs
index 5455150319d8..0c7c90263481 100644
--- a/substrate/frame/election-provider-multi-block/src/types.rs
+++ b/substrate/frame/election-provider-multi-block/src/types.rs
@@ -22,7 +22,6 @@ use frame_support::{BoundedVec, DebugNoBound};
 use scale_info::TypeInfo;
 use sp_npos_elections::ElectionScore;
 use sp_runtime::SaturatedConversion;
-use sp_std::{boxed::Box, vec::Vec};
 
 use crate::{unsigned::miner, Verifier};
 
diff --git a/substrate/frame/election-provider-multi-block/src/unsigned/miner.rs b/substrate/frame/election-provider-multi-block/src/unsigned/miner.rs
index f27e07d099ce..ca11b18914ba 100644
--- a/substrate/frame/election-provider-multi-block/src/unsigned/miner.rs
+++ b/substrate/frame/election-provider-multi-block/src/unsigned/miner.rs
@@ -19,26 +19,21 @@
 
 use crate::{
 	helpers,
-	types::{PageSize, Pagify, SupportsOf, VoterOf},
+	types::{PageSize, Pagify},
 	unsigned::{pallet::Config as UnsignedConfig, Call},
 	verifier::FeasibilityError,
-	MinerAssignmentOf, MinerSolutionAccuracyOf, MinerSupportsOf, MinerVoterOf, Pallet as EPM,
-	Snapshot, SolutionAccuracyOf, SolutionOf,
+	MinerAssignmentOf, MinerSupportsOf, MinerVoterOf, Pallet as EPM, Snapshot,
 };
 
-use codec::Encode;
 use frame_election_provider_support::{
-	DataProviderBounds, ElectionDataProvider, IndexAssignmentOf, NposSolution, NposSolver,
-	PageIndex, TryIntoBoundedSupports, Weight,
+	ElectionDataProvider, IndexAssignmentOf, NposSolution, NposSolver, PageIndex,
+	TryIntoBoundedSupports, Weight,
 };
 use frame_support::{ensure, traits::Get, BoundedVec};
 use scale_info::TypeInfo;
-use sp_npos_elections::{
-	assignment_ratio_to_staked_normalized, assignment_staked_to_ratio_normalized, ElectionResult,
-	ElectionScore, ExtendedBalance, PerThing128, Support,
-};
-use sp_runtime::{offchain::storage::StorageValueRef, traits::Zero, SaturatedConversion};
-use sp_std::{vec, vec::Vec};
+use sp_npos_elections::{ElectionResult, ElectionScore, ExtendedBalance, Support};
+use sp_runtime::{offchain::storage::StorageValueRef, SaturatedConversion};
+use sp_std::vec;
 
 pub type TargetSnaphsotOf<T> =
 	BoundedVec<<T as Config>::AccountId, <T as Config>::TargetSnapshotPerBlock>;
diff --git a/substrate/frame/election-provider-multi-block/src/unsigned/mod.rs b/substrate/frame/election-provider-multi-block/src/unsigned/mod.rs
index e000bee227a7..067fd0d5d8f6 100644
--- a/substrate/frame/election-provider-multi-block/src/unsigned/mod.rs
+++ b/substrate/frame/election-provider-multi-block/src/unsigned/mod.rs
@@ -67,10 +67,10 @@ mod tests;
 
 use crate::{
 	unsigned::{
-		miner::{Config as MinerConfig, OffchainMinerError, OffchainWorkerMiner},
+		miner::{OffchainMinerError, OffchainWorkerMiner},
 		weights::WeightInfo,
 	},
-	verifier, AccountIdOf, Pallet as EPM, Phase, SolutionAccuracyOf, SolutionOf, Verifier,
+	verifier, Phase, SolutionOf, Verifier,
 };
 use frame_election_provider_support::PageIndex;
 use frame_support::{
@@ -81,7 +81,6 @@ use frame_support::{
 use frame_system::{offchain::SendTransactionTypes, pallet_prelude::BlockNumberFor};
 use sp_npos_elections::ElectionScore;
 use sp_runtime::SaturatedConversion;
-use sp_std::vec::Vec;
 
 // public re-exports.
 pub use pallet::{
@@ -92,8 +91,6 @@ pub use pallet::{
 #[frame_support::pallet(dev_mode)]
 pub(crate) mod pallet {
 
-	use crate::MinerSolutionAccuracyOf;
-
 	use super::*;
 	use frame_support::pallet_prelude::*;
 	use frame_system::{
diff --git a/substrate/frame/election-provider-multi-block/src/unsigned/tests.rs b/substrate/frame/election-provider-multi-block/src/unsigned/tests.rs
index 565046f52181..328eb4d8b060 100644
--- a/substrate/frame/election-provider-multi-block/src/unsigned/tests.rs
+++ b/substrate/frame/election-provider-multi-block/src/unsigned/tests.rs
@@ -17,13 +17,12 @@
 
 use super::*;
 use crate::{
-	mock::*,
-	unsigned::{miner::*, pallet::Config as UnsignedConfig},
-	PagedTargetSnapshot, PagedVoterSnapshot, Phase, Snapshot, Verifier,
+	mock::*, unsigned::miner::Config, PagedTargetSnapshot, PagedVoterSnapshot, Phase, Snapshot,
+	Verifier,
 };
 
 use frame_election_provider_support::ElectionProvider;
-use frame_support::{assert_noop, assert_ok};
+use frame_support::assert_ok;
 
 mod calls {
 	use super::*;
diff --git a/substrate/frame/election-provider-multi-block/src/verifier/impls.rs b/substrate/frame/election-provider-multi-block/src/verifier/impls.rs
index f2563a0f2867..7a3cb1a4b6b1 100644
--- a/substrate/frame/election-provider-multi-block/src/verifier/impls.rs
+++ b/substrate/frame/election-provider-multi-block/src/verifier/impls.rs
@@ -23,23 +23,17 @@ use frame_support::{
 	traits::{Defensive, TryCollect},
 	BoundedVec,
 };
-use sp_runtime::{
-	traits::{BlockNumber, One, Zero},
-	Perbill, Saturating,
-};
+use sp_runtime::{traits::Zero, Perbill};
 use sp_std::{collections::btree_map::BTreeMap, vec::Vec};
 
 use super::*;
 use pallet::*;
 
-use crate::{
-	helpers, unsigned::miner, verifier::weights::WeightInfo, AccountIdOf, SolutionAccuracyOf,
-	SolutionOf,
-};
+use crate::{helpers, unsigned::miner, verifier::weights::WeightInfo, SolutionOf};
 
 #[frame_support::pallet(dev_mode)]
 pub(crate) mod pallet {
-	use crate::{SolutionVoterIndexOf, SupportsOf};
+	use crate::SupportsOf;
 
 	use super::*;
 	use frame_support::pallet_prelude::{ValueQuery, *};
diff --git a/substrate/frame/election-provider-multi-block/src/verifier/tests.rs b/substrate/frame/election-provider-multi-block/src/verifier/tests.rs
index cdce1ebc0a62..177170bcac19 100644
--- a/substrate/frame/election-provider-multi-block/src/verifier/tests.rs
+++ b/substrate/frame/election-provider-multi-block/src/verifier/tests.rs
@@ -75,10 +75,6 @@ mod feasibility_check {
 
 mod sync_verifier {
 	use super::*;
-	use crate::{
-		verifier::{impls::pallet::QueuedSolution, SolutionPointer},
-		SupportsOf, Verifier,
-	};
 
 	#[test]
 	fn sync_verifier_simple_works() {
diff --git a/substrate/primitives/core/src/offchain/mod.rs b/substrate/primitives/core/src/offchain/mod.rs
index 9be86e85d587..afbbac18541b 100644
--- a/substrate/primitives/core/src/offchain/mod.rs
+++ b/substrate/primitives/core/src/offchain/mod.rs
@@ -18,7 +18,6 @@
 //! Offchain workers types
 
 use crate::{OpaquePeerId, RuntimeDebug};
-use alloc::{boxed::Box, vec::Vec};
 use codec::{Decode, Encode};
 use scale_info::TypeInfo;
 use sp_runtime_interface::pass_by::{PassByCodec, PassByEnum, PassByInner};
diff --git a/substrate/primitives/npos-elections/src/helpers.rs b/substrate/primitives/npos-elections/src/helpers.rs
index 7df6ec9d9dba..0d6e37f0d3ab 100644
--- a/substrate/primitives/npos-elections/src/helpers.rs
+++ b/substrate/primitives/npos-elections/src/helpers.rs
@@ -18,7 +18,6 @@
 //! Helper methods for npos-elections.
 
 use crate::{Assignment, Error, IdentifierT, PerThing128, StakedAssignment, VoteWeight};
-use alloc::vec::Vec;
 use sp_arithmetic::PerThing;
 
 /// Converts a vector of ratio assignments into ones with absolute budget value.