Remove migration code. (#5291)

* Remove migration code.

* Fix cargo

* Bump spec version

substrate/frame/society/src/lib.rs

@@ -261,7 +261,10 @@ use sp_runtime::{Percent, ModuleId, RuntimeDebug,
 };
 use frame_support::{decl_error, decl_module, decl_storage, decl_event, ensure, dispatch::DispatchResult};
 use frame_support::weights::SimpleDispatchInfo;
-use frame_support::traits::{Currency, ReservableCurrency, Randomness, Get, ChangeMembers, BalanceStatus, ExistenceRequirement::AllowDeath, MigrateAccount};
+use frame_support::traits::{
+	Currency, ReservableCurrency, Randomness, Get, ChangeMembers, BalanceStatus,
+	ExistenceRequirement::AllowDeath
+};
 use frame_system::{self as system, ensure_signed, ensure_root};
 
 type BalanceOf<T, I> = <<T as Trait<I>>::Currency as Currency<<T as system::Trait>::AccountId>>::Balance;
@@ -1130,12 +1133,6 @@ decl_event! {
 	}
 }
 
-impl<T: Trait> MigrateAccount<T::AccountId> for Module<T> {
-	fn migrate_account(a: &T::AccountId) {
-		Payouts::<T>::migrate_key_from_blake(a);
-	}
-}
-
 /// Simple ensure origin struct to filter for the founder account.
 pub struct EnsureFounder<T>(sp_std::marker::PhantomData<T>);
 impl<T: Trait> EnsureOrigin<T::Origin> for EnsureFounder<T> {

substrate/frame/society/src/mock.rs

@@ -77,7 +77,7 @@ impl frame_system::Trait for Test {
 	type AvailableBlockRatio = AvailableBlockRatio;
 	type Version = ();
 	type ModuleToIndex = ();
-	type MigrateAccount = (); type OnNewAccount = ();
+	type OnNewAccount = ();
 	type OnKilledAccount = ();
 	type AccountData = pallet_balances::AccountData<u64>;
 }