diff --git a/runtime/kusama/src/lib.rs b/runtime/kusama/src/lib.rs
index d596769dd2e6..a33e35f591d9 100644
--- a/runtime/kusama/src/lib.rs
+++ b/runtime/kusama/src/lib.rs
@@ -51,7 +51,6 @@ use frame_support::{
 	construct_runtime, parameter_types,
 	traits::{
 		Contains, Everything, InstanceFilter, KeyOwnerProofSystem, LockIdentifier, Nothing,
-		OnRuntimeUpgrade,
 	},
 	weights::Weight,
 	PalletId, RuntimeDebug,
@@ -1557,186 +1556,11 @@ pub type Executive = frame_executive::Executive<
 	frame_system::ChainContext<Runtime>,
 	Runtime,
 	AllPallets,
-	(
-		CouncilStoragePrefixMigration,
-		TechnicalCommitteeStoragePrefixMigration,
-		TechnicalMembershipStoragePrefixMigration,
-		MigrateTipsPalletPrefix,
-		BountiesPrefixMigration,
-		StakingBagsListMigrationV8,
-	),
+	(),
 >;
 /// The payload being signed in the transactions.
 pub type SignedPayload = generic::SignedPayload<Call, SignedExtra>;
 
-const BOUNTIES_OLD_PREFIX: &str = "Treasury";
-
-/// Migrate from 'Treasury' to the new prefix 'Bounties'
-pub struct BountiesPrefixMigration;
-
-impl OnRuntimeUpgrade for BountiesPrefixMigration {
-	fn on_runtime_upgrade() -> frame_support::weights::Weight {
-		use frame_support::traits::PalletInfo;
-		let name = <Runtime as frame_system::Config>::PalletInfo::name::<Bounties>()
-			.expect("Bounties is part of runtime, so it has a name; qed");
-		pallet_bounties::migrations::v4::migrate::<Runtime, Bounties, _>(BOUNTIES_OLD_PREFIX, name)
-	}
-	#[cfg(feature = "try-runtime")]
-	fn pre_upgrade() -> Result<(), &'static str> {
-		use frame_support::traits::PalletInfo;
-		let name = <Runtime as frame_system::Config>::PalletInfo::name::<Bounties>()
-			.expect("Bounties is part of runtime, so it has a name; qed");
-		pallet_bounties::migrations::v4::pre_migration::<Runtime, Bounties, _>(
-			BOUNTIES_OLD_PREFIX,
-			name,
-		);
-		Ok(())
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn post_upgrade() -> Result<(), &'static str> {
-		use frame_support::traits::PalletInfo;
-		let name = <Runtime as frame_system::Config>::PalletInfo::name::<Bounties>()
-			.expect("Bounties is part of runtime, so it has a name; qed");
-		pallet_bounties::migrations::v4::post_migration::<Runtime, Bounties, _>(
-			BOUNTIES_OLD_PREFIX,
-			name,
-		);
-		Ok(())
-	}
-}
-
-const COUNCIL_OLD_PREFIX: &str = "Instance1Collective";
-/// Migrate from `Instance1Collective` to the new pallet prefix `Council`
-pub struct CouncilStoragePrefixMigration;
-
-impl OnRuntimeUpgrade for CouncilStoragePrefixMigration {
-	fn on_runtime_upgrade() -> frame_support::weights::Weight {
-		pallet_collective::migrations::v4::migrate::<Runtime, Council, _>(COUNCIL_OLD_PREFIX)
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn pre_upgrade() -> Result<(), &'static str> {
-		pallet_collective::migrations::v4::pre_migrate::<Council, _>(COUNCIL_OLD_PREFIX);
-		Ok(())
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn post_upgrade() -> Result<(), &'static str> {
-		pallet_collective::migrations::v4::post_migrate::<Council, _>(COUNCIL_OLD_PREFIX);
-		Ok(())
-	}
-}
-
-const TECHNICAL_COMMITTEE_OLD_PREFIX: &str = "Instance2Collective";
-/// Migrate from `Instance2Collective` to the new pallet prefix `TechnicalCommittee`
-pub struct TechnicalCommitteeStoragePrefixMigration;
-
-impl OnRuntimeUpgrade for TechnicalCommitteeStoragePrefixMigration {
-	fn on_runtime_upgrade() -> frame_support::weights::Weight {
-		pallet_collective::migrations::v4::migrate::<Runtime, TechnicalCommittee, _>(
-			TECHNICAL_COMMITTEE_OLD_PREFIX,
-		)
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn pre_upgrade() -> Result<(), &'static str> {
-		pallet_collective::migrations::v4::pre_migrate::<TechnicalCommittee, _>(
-			TECHNICAL_COMMITTEE_OLD_PREFIX,
-		);
-		Ok(())
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn post_upgrade() -> Result<(), &'static str> {
-		pallet_collective::migrations::v4::post_migrate::<TechnicalCommittee, _>(
-			TECHNICAL_COMMITTEE_OLD_PREFIX,
-		);
-		Ok(())
-	}
-}
-
-const TECHNICAL_MEMBERSHIP_OLD_PREFIX: &str = "Instance1Membership";
-/// Migrate from `Instance1Membership` to the new pallet prefix `TechnicalMembership`
-pub struct TechnicalMembershipStoragePrefixMigration;
-
-impl OnRuntimeUpgrade for TechnicalMembershipStoragePrefixMigration {
-	fn on_runtime_upgrade() -> frame_support::weights::Weight {
-		use frame_support::traits::PalletInfo;
-		let name = <Runtime as frame_system::Config>::PalletInfo::name::<TechnicalMembership>()
-			.expect("TechnicalMembership is part of runtime, so it has a name; qed");
-		pallet_membership::migrations::v4::migrate::<Runtime, TechnicalMembership, _>(
-			TECHNICAL_MEMBERSHIP_OLD_PREFIX,
-			name,
-		)
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn pre_upgrade() -> Result<(), &'static str> {
-		use frame_support::traits::PalletInfo;
-		let name = <Runtime as frame_system::Config>::PalletInfo::name::<TechnicalMembership>()
-			.expect("TechnicalMembership is part of runtime, so it has a name; qed");
-		pallet_membership::migrations::v4::pre_migrate::<TechnicalMembership, _>(
-			TECHNICAL_MEMBERSHIP_OLD_PREFIX,
-			name,
-		);
-		Ok(())
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn post_upgrade() -> Result<(), &'static str> {
-		use frame_support::traits::PalletInfo;
-		let name = <Runtime as frame_system::Config>::PalletInfo::name::<TechnicalMembership>()
-			.expect("TechnicalMembership is part of runtime, so it has a name; qed");
-		pallet_membership::migrations::v4::post_migrate::<TechnicalMembership, _>(
-			TECHNICAL_MEMBERSHIP_OLD_PREFIX,
-			name,
-		);
-		Ok(())
-	}
-}
-
-const TIPS_OLD_PREFIX: &str = "Treasury";
-/// Migrate pallet-tips from `Treasury` to the new pallet prefix `Tips`
-pub struct MigrateTipsPalletPrefix;
-
-impl OnRuntimeUpgrade for MigrateTipsPalletPrefix {
-	fn on_runtime_upgrade() -> frame_support::weights::Weight {
-		pallet_tips::migrations::v4::migrate::<Runtime, Tips, _>(TIPS_OLD_PREFIX)
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn pre_upgrade() -> Result<(), &'static str> {
-		pallet_tips::migrations::v4::pre_migrate::<Runtime, Tips, _>(TIPS_OLD_PREFIX);
-		Ok(())
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn post_upgrade() -> Result<(), &'static str> {
-		pallet_tips::migrations::v4::post_migrate::<Runtime, Tips, _>(TIPS_OLD_PREFIX);
-		Ok(())
-	}
-}
-
-// Migration to generate pallet staking's `SortedListProvider` from pre-existing nominators.
-pub struct StakingBagsListMigrationV8;
-
-impl OnRuntimeUpgrade for StakingBagsListMigrationV8 {
-	fn on_runtime_upgrade() -> frame_support::weights::Weight {
-		pallet_staking::migrations::v8::migrate::<Runtime>()
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn pre_upgrade() -> Result<(), &'static str> {
-		pallet_staking::migrations::v8::pre_migrate::<Runtime>()
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn post_upgrade() -> Result<(), &'static str> {
-		pallet_staking::migrations::v8::post_migrate::<Runtime>()
-	}
-}
-
 #[cfg(not(feature = "disable-runtime-api"))]
 sp_api::impl_runtime_apis! {
 	impl sp_api::Core<Block> for Runtime {
diff --git a/runtime/polkadot/src/lib.rs b/runtime/polkadot/src/lib.rs
index c43fbcb85393..60e12bc8ad78 100644
--- a/runtime/polkadot/src/lib.rs
+++ b/runtime/polkadot/src/lib.rs
@@ -1349,146 +1349,11 @@ pub type Executive = frame_executive::Executive<
 	frame_system::ChainContext<Runtime>,
 	Runtime,
 	AllPallets,
-	(
-		SetInitialHostConfiguration,
-		BountiesPrefixMigration,
-		CouncilStoragePrefixMigration,
-		TechnicalCommitteeStoragePrefixMigration,
-		TechnicalMembershipStoragePrefixMigration,
-		MigrateTipsPalletPrefix,
-	),
+	(),
 >;
 /// The payload being signed in transactions.
 pub type SignedPayload = generic::SignedPayload<Call, SignedExtra>;
 
-const BOUNTIES_OLD_PREFIX: &str = "Treasury";
-
-/// Migrate from 'Treasury' to the new prefix 'Bounties'
-pub struct BountiesPrefixMigration;
-
-impl OnRuntimeUpgrade for BountiesPrefixMigration {
-	fn on_runtime_upgrade() -> frame_support::weights::Weight {
-		use frame_support::traits::PalletInfo;
-		let name = <Runtime as frame_system::Config>::PalletInfo::name::<Bounties>()
-			.expect("Bounties is part of runtime, so it has a name; qed");
-		pallet_bounties::migrations::v4::migrate::<Runtime, Bounties, _>(BOUNTIES_OLD_PREFIX, name)
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn pre_upgrade() -> Result<(), &'static str> {
-		use frame_support::traits::PalletInfo;
-		let name = <Runtime as frame_system::Config>::PalletInfo::name::<Bounties>()
-			.expect("Bounties is part of runtime, so it has a name; qed");
-		pallet_bounties::migrations::v4::pre_migration::<Runtime, Bounties, _>(
-			BOUNTIES_OLD_PREFIX,
-			name,
-		);
-		Ok(())
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn post_upgrade() -> Result<(), &'static str> {
-		use frame_support::traits::PalletInfo;
-		let name = <Runtime as frame_system::Config>::PalletInfo::name::<Bounties>()
-			.expect("Bounties is part of runtime, so it has a name; qed");
-		pallet_bounties::migrations::v4::post_migration::<Runtime, Bounties, _>(
-			BOUNTIES_OLD_PREFIX,
-			name,
-		);
-		Ok(())
-	}
-}
-
-const COUNCIL_OLD_PREFIX: &str = "Instance1Collective";
-/// Migrate from `Instance1Collective` to the new pallet prefix `Council`
-pub struct CouncilStoragePrefixMigration;
-
-impl OnRuntimeUpgrade for CouncilStoragePrefixMigration {
-	fn on_runtime_upgrade() -> frame_support::weights::Weight {
-		pallet_collective::migrations::v4::migrate::<Runtime, Council, _>(COUNCIL_OLD_PREFIX)
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn pre_upgrade() -> Result<(), &'static str> {
-		pallet_collective::migrations::v4::pre_migrate::<Council, _>(COUNCIL_OLD_PREFIX);
-		Ok(())
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn post_upgrade() -> Result<(), &'static str> {
-		pallet_collective::migrations::v4::post_migrate::<Council, _>(COUNCIL_OLD_PREFIX);
-		Ok(())
-	}
-}
-
-const TECHNICAL_COMMITTEE_OLD_PREFIX: &str = "Instance2Collective";
-/// Migrate from `Instance2Collective` to the new pallet prefix `TechnicalCommittee`
-pub struct TechnicalCommitteeStoragePrefixMigration;
-
-impl OnRuntimeUpgrade for TechnicalCommitteeStoragePrefixMigration {
-	fn on_runtime_upgrade() -> frame_support::weights::Weight {
-		pallet_collective::migrations::v4::migrate::<Runtime, TechnicalCommittee, _>(
-			TECHNICAL_COMMITTEE_OLD_PREFIX,
-		)
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn pre_upgrade() -> Result<(), &'static str> {
-		pallet_collective::migrations::v4::pre_migrate::<TechnicalCommittee, _>(
-			TECHNICAL_COMMITTEE_OLD_PREFIX,
-		);
-		Ok(())
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn post_upgrade() -> Result<(), &'static str> {
-		pallet_collective::migrations::v4::post_migrate::<TechnicalCommittee, _>(
-			TECHNICAL_COMMITTEE_OLD_PREFIX,
-		);
-		Ok(())
-	}
-}
-
-const TECHNICAL_MEMBERSHIP_OLD_PREFIX: &str = "Instance1Membership";
-/// Migrate from `Instance1Membership` to the new pallet prefix `TechnicalMembership`
-pub struct TechnicalMembershipStoragePrefixMigration;
-
-impl OnRuntimeUpgrade for TechnicalMembershipStoragePrefixMigration {
-	fn on_runtime_upgrade() -> frame_support::weights::Weight {
-		use frame_support::traits::PalletInfo;
-		let name = <Runtime as frame_system::Config>::PalletInfo::name::<TechnicalMembership>()
-			.expect("TechnialMembership is part of runtime, so it has a name; qed");
-		pallet_membership::migrations::v4::migrate::<Runtime, TechnicalMembership, _>(
-			TECHNICAL_MEMBERSHIP_OLD_PREFIX,
-			name,
-		)
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn pre_upgrade() -> Result<(), &'static str> {
-		use frame_support::traits::PalletInfo;
-		let name = <Runtime as frame_system::Config>::PalletInfo::name::<TechnicalMembership>()
-			.expect("TechnicalMembership is part of runtime, so it has a name; qed");
-		pallet_membership::migrations::v4::pre_migrate::<TechnicalMembership, _>(
-			TECHNICAL_MEMBERSHIP_OLD_PREFIX,
-			name,
-		);
-		Ok(())
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn post_upgrade() -> Result<(), &'static str> {
-		use frame_support::traits::PalletInfo;
-		let name = <Runtime as frame_system::Config>::PalletInfo::name::<TechnicalMembership>()
-			.expect("TechnicalMembership is part of runtime, so it has a name; qed");
-		pallet_membership::migrations::v4::post_migrate::<TechnicalMembership, _>(
-			TECHNICAL_MEMBERSHIP_OLD_PREFIX,
-			name,
-		);
-		Ok(())
-	}
-}
-
 /// Set the initial host configuration for Polkadot.
 pub struct SetInitialHostConfiguration;
 impl OnRuntimeUpgrade for SetInitialHostConfiguration {
diff --git a/runtime/westend/src/lib.rs b/runtime/westend/src/lib.rs
index 55ef0c129c2a..c19d16030539 100644
--- a/runtime/westend/src/lib.rs
+++ b/runtime/westend/src/lib.rs
@@ -20,7 +20,6 @@
 // `construct_runtime!` does a lot of recursion and requires us to increase the limit to 256.
 #![recursion_limit = "256"]
 
-use frame_support::traits::OnRuntimeUpgrade;
 use pallet_transaction_payment::CurrencyAdapter;
 use parity_scale_codec::{Decode, Encode, MaxEncodedLen};
 use primitives::v1::{
@@ -1135,30 +1134,11 @@ pub type Executive = frame_executive::Executive<
 	frame_system::ChainContext<Runtime>,
 	Runtime,
 	AllPallets,
-	(StakingBagsListMigrationV8,),
+	(),
 >;
 /// The payload being signed in transactions.
 pub type SignedPayload = generic::SignedPayload<Call, SignedExtra>;
 
-// Migration to generate pallet staking's `SortedListProvider` from pre-existing nominators.
-pub struct StakingBagsListMigrationV8;
-
-impl OnRuntimeUpgrade for StakingBagsListMigrationV8 {
-	fn on_runtime_upgrade() -> frame_support::weights::Weight {
-		pallet_staking::migrations::v8::migrate::<Runtime>()
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn pre_upgrade() -> Result<(), &'static str> {
-		pallet_staking::migrations::v8::pre_migrate::<Runtime>()
-	}
-
-	#[cfg(feature = "try-runtime")]
-	fn post_upgrade() -> Result<(), &'static str> {
-		pallet_staking::migrations::v8::post_migrate::<Runtime>()
-	}
-}
-
 #[cfg(not(feature = "disable-runtime-api"))]
 sp_api::impl_runtime_apis! {
 	impl sp_api::Core<Block> for Runtime {