Remove indices migration

frame/indices/src/lib.rs

@@ -28,7 +28,6 @@ use frame_support::{Parameter, decl_module, decl_error, decl_event, decl_storage
 use frame_support::weights::Weight;
 use frame_support::dispatch::DispatchResult;
 use frame_support::traits::{Currency, ReservableCurrency, Get, BalanceStatus::Reserved};
-use frame_support::storage::migration::take_storage_value;
 use frame_system::{ensure_signed, ensure_root};
 use self::address::Address as RawAddress;
 
@@ -99,12 +98,6 @@ decl_module! {
 	pub struct Module<T: Trait> for enum Call where origin: T::Origin, system = frame_system {
 		fn deposit_event() = default;
 
-		fn on_initialize() -> Weight {
-			Self::migrations();
-
-			0
-		}
-
 		/// Assign an previously unassigned index.
 		///
 		/// Payment: `Deposit` is reserved from the sender account.
@@ -241,30 +234,6 @@ impl<T: Trait> Module<T> {
 			address::Address::Index(i) => Self::lookup_index(i),
 		}
 	}
-
-	/// Do any migrations.
-	fn migrations() {
-		if let Some(set_count) = take_storage_value::<T::AccountIndex>(b"Indices", b"NextEnumSet", b"") {
-			// migrations need doing.
-			let set_size: T::AccountIndex = 64.into();
-
-			let mut set_index: T::AccountIndex = Zero::zero();
-			while set_index < set_count {
-				let maybe_accounts = take_storage_value::<Vec<T::AccountId>>(b"Indices", b"EnumSet", BlakeTwo256::hash_of(&set_index).as_ref());
-				if let Some(accounts) = maybe_accounts {
-					for (item_index, target) in accounts.into_iter().enumerate() {
-						if target != T::AccountId::default() && !T::Currency::total_balance(&target).is_zero() {
-							let index = set_index * set_size + T::AccountIndex::from(item_index as u32);
-							Accounts::<T>::insert(index, (target, BalanceOf::<T>::zero()));
-						}
-					}
-				} else {
-					break;
-				}
-				set_index += One::one();
-			}
-		}
-	}
 }
 
 impl<T: Trait> StaticLookup for Module<T> {