Remove migration code. (#5291)

* Remove migration code.

* Fix cargo

* Bump spec version

substrate/frame/recovery/src/lib.rs

@@ -163,7 +163,6 @@ use frame_support::{
 	traits::{Currency, ReservableCurrency, Get, BalanceStatus},
 };
 use frame_system::{self as system, ensure_signed, ensure_root};
-use frame_support::traits::MigrateAccount;
 
 #[cfg(test)]
 mod mock;
@@ -258,13 +257,6 @@ decl_storage! {
 	}
 }
 
-impl<T: Trait> MigrateAccount<T::AccountId> for Module<T> {
-	fn migrate_account(a: &T::AccountId) {
-		Recoverable::<T>::migrate_key_from_blake(a);
-		Proxy::<T>::migrate_key_from_blake(a);
-	}
-}
-
 decl_event! {
 	/// Events type.
 	pub enum Event<T> where

substrate/frame/recovery/src/mock.rs

@@ -79,7 +79,7 @@ impl frame_system::Trait for Test {
 	type Version = ();
 	type ModuleToIndex = ();
 	type AccountData = pallet_balances::AccountData<u128>;
-	type MigrateAccount = (); type OnNewAccount = ();
+	type OnNewAccount = ();
 	type OnKilledAccount = ();
 }