Remove migration code. (#5291)

* Remove migration code.

* Fix cargo

* Bump spec version

substrate/frame/vesting/src/lib.rs

@@ -53,7 +53,10 @@ use sp_runtime::{DispatchResult, RuntimeDebug, traits::{
 	StaticLookup, Zero, AtLeast32Bit, MaybeSerializeDeserialize, Convert
 }};
 use frame_support::{decl_module, decl_event, decl_storage, decl_error, ensure};
-use frame_support::traits::{Currency, LockableCurrency, VestingSchedule, WithdrawReason, LockIdentifier, ExistenceRequirement, Get, MigrateAccount};
+use frame_support::traits::{
+	Currency, LockableCurrency, VestingSchedule, WithdrawReason, LockIdentifier,
+	ExistenceRequirement, Get
+};
 use frame_support::weights::SimpleDispatchInfo;
 use frame_system::{self as system, ensure_signed};
 
@@ -254,12 +257,6 @@ decl_module! {
 	}
 }
 
-impl<T: Trait> MigrateAccount<T::AccountId> for Module<T> {
-	fn migrate_account(a: &T::AccountId) {
-		Vesting::<T>::migrate_key_from_blake(a);
-	}
-}
-
 impl<T: Trait> Module<T> {
 	/// (Re)set or remove the module's currency lock on `who`'s account in accordance with their
 	/// current unvested amount.
@@ -388,7 +385,7 @@ mod tests {
 		type Version = ();
 		type ModuleToIndex = ();
 		type AccountData = pallet_balances::AccountData<u64>;
-		type MigrateAccount = (); type OnNewAccount = ();
+		type OnNewAccount = ();
 		type OnKilledAccount = ();
 	}
 	impl pallet_balances::Trait for Test {