clean up executed runtime migrations (#6206)

* kusama: clean up executed migrations

* polkadot: clean up executed migrations

* westend: clean up executed migrations

Author: coderobe

runtime/kusama/src/lib.rs

@@ -1465,12 +1465,6 @@ pub type Executive = frame_executive::Executive<
 	Runtime,
 	AllPalletsWithSystem,
 	(
-		pallet_staking::migrations::v11::MigrateToV11<
-			Runtime,
-			VoterList,
-			StakingMigrationV11OldPallet,
-		>,
-		pallet_staking::migrations::v12::MigrateToV12<Runtime>,
 		// "Bound uses of call" <https://github.com/paritytech/polkadot/pull/5729>
 		pallet_preimage::migration::v1::Migration<Runtime>,
 		pallet_scheduler::migration::v3::MigrateToV4<Runtime>,

runtime/polkadot/src/lib.rs

@@ -1558,12 +1558,6 @@ pub type Executive = frame_executive::Executive<
 	Runtime,
 	AllPalletsWithSystem,
 	(
-		pallet_staking::migrations::v11::MigrateToV11<
-			Runtime,
-			VoterList,
-			StakingMigrationV11OldPallet,
-		>,
-		pallet_staking::migrations::v12::MigrateToV12<Runtime>,
 		// "Bound uses of call" <https://github.com/paritytech/polkadot/pull/5729>
 		pallet_preimage::migration::v1::Migration<Runtime>,
 		pallet_scheduler::migration::v3::MigrateToV4<Runtime>,

runtime/westend/src/lib.rs

@@ -1210,12 +1210,6 @@ pub type Executive = frame_executive::Executive<
 	Runtime,
 	AllPalletsWithSystem,
 	(
-		pallet_staking::migrations::v11::MigrateToV11<
-			Runtime,
-			VoterList,
-			StakingMigrationV11OldPallet,
-		>,
-		pallet_staking::migrations::v12::MigrateToV12<Runtime>,
 		// "Bound uses of call" <https://github.com/paritytech/polkadot/pull/5729>
 		pallet_preimage::migration::v1::Migration<Runtime>,
 		pallet_scheduler::migration::v3::MigrateToV4<Runtime>,