Remove migration done by runtime version 9090 (#3731)

* remove 9090 migrations

* remove unused

* fmt

* revert removal of polkadot migration

* remove migration for polkadot

polkadot/runtime/westend/src/lib.rs

@@ -58,9 +58,7 @@ use authority_discovery_primitives::AuthorityId as AuthorityDiscoveryId;
 use beefy_primitives::crypto::AuthorityId as BeefyId;
 use frame_support::{
 	construct_runtime, parameter_types,
-	traits::{
-		Contains, Everything, InstanceFilter, KeyOwnerProofSystem, Nothing, OnRuntimeUpgrade,
-	},
+	traits::{Contains, Everything, InstanceFilter, KeyOwnerProofSystem, Nothing},
 	weights::Weight,
 	PalletId, RuntimeDebug,
 };
@@ -1087,22 +1085,11 @@ pub type Executive = frame_executive::Executive<
 	frame_system::ChainContext<Runtime>,
 	Runtime,
 	AllPallets,
-	MigratePalletVersionToStorageVersion,
+	(),
 >;
 /// The payload being signed in transactions.
 pub type SignedPayload = generic::SignedPayload<Call, SignedExtra>;
 
-/// Migrate from `PalletVersion` to the new `StorageVersion`
-pub struct MigratePalletVersionToStorageVersion;
-
-impl OnRuntimeUpgrade for MigratePalletVersionToStorageVersion {
-	fn on_runtime_upgrade() -> frame_support::weights::Weight {
-		frame_support::migrations::migrate_from_pallet_version_to_storage_version::<
-			AllPalletsWithSystem,
-		>(&RocksDbWeight::get())
-	}
-}
-
 #[cfg(not(feature = "disable-runtime-api"))]
 sp_api::impl_runtime_apis! {
 	impl sp_api::Core<Block> for Runtime {