Replace () filter with Nothing (#3665)

* replace `()` filter with `Nothing`

* import nothing

* add nothing

* update Substrate

Co-authored-by: parity-processbot <>

polkadot/runtime/kusama/src/lib.rs

@@ -50,7 +50,8 @@ use beefy_primitives::crypto::AuthorityId as BeefyId;
 use frame_support::{
 	construct_runtime, parameter_types,
 	traits::{
-		Contains, Everything, InstanceFilter, KeyOwnerProofSystem, LockIdentifier, OnRuntimeUpgrade,
+		Contains, Everything, InstanceFilter, KeyOwnerProofSystem, LockIdentifier, Nothing,
+		OnRuntimeUpgrade,
 	},
 	weights::Weight,
 	PalletId, RuntimeDebug,
@@ -1319,7 +1320,7 @@ impl pallet_xcm::Config for Runtime {
 	// Anyone can execute XCM messages locally...
 	type ExecuteXcmOrigin = xcm_builder::EnsureXcmOrigin<Origin, LocalOriginToLocation>;
 	// ...but they must match our filter, which rejects all.
-	type XcmExecuteFilter = ();
+	type XcmExecuteFilter = Nothing;
 	type XcmExecutor = XcmExecutor<XcmConfig>;
 	type XcmTeleportFilter = Everything;
 	type XcmReserveTransferFilter = Everything;