Remove migration code. (#5291)

* Remove migration code.

* Fix cargo

* Bump spec version

substrate/frame/im-online/src/lib.rs

@@ -95,7 +95,6 @@ use frame_support::{
 };
 use frame_system::{self as system, ensure_none};
 use frame_system::offchain::SubmitUnsignedTransaction;
-use frame_support::traits::MigrateAccount;
 
 pub mod sr25519 {
 	mod app_sr25519 {
@@ -303,38 +302,12 @@ decl_error! {
 	}
 }
 
-mod migration {
-	use super::*;
-	use frame_support::Blake2_256;
-	pub fn migrate<T: Trait>() {
-		let current_index = <pallet_session::Module<T>>::current_index();
-		let key_count = Keys::<T>::get().len() as AuthIndex;
-		for i in 0..key_count {
-			ReceivedHeartbeats::migrate_keys::<Blake2_256, Blake2_256, _, _>(current_index, i);
-		}
-	}
-}
-
-impl<T: Trait> MigrateAccount<T::AccountId> for Module<T> {
-	fn migrate_account(a: &T::AccountId) {
-		use frame_support::Blake2_256;
-		let current_index = <pallet_session::Module<T>>::current_index();
-		if let Ok(v) = a.using_encoded(|mut d| T::ValidatorId::decode(&mut d)) {
-			AuthoredBlocks::<T>::migrate_keys::<Blake2_256, Blake2_256, _, _>(current_index, v);
-		}
-	}
-}
-
 decl_module! {
 	pub struct Module<T: Trait> for enum Call where origin: T::Origin {
 		type Error = Error<T>;
 
 		fn deposit_event() = default;
 
-		fn on_runtime_upgrade() {
-			migration::migrate::<T>();
-		}
-
 		fn heartbeat(
 			origin,
 			heartbeat: Heartbeat<T::BlockNumber>,

substrate/frame/im-online/src/mock.rs

@@ -119,7 +119,7 @@ impl frame_system::Trait for Runtime {
 	type Version = ();
 	type ModuleToIndex = ();
 	type AccountData = ();
-	type MigrateAccount = (); type OnNewAccount = ();
+	type OnNewAccount = ();
 	type OnKilledAccount = ();
 }