Revert "[Runtime] Bound XCMP queue" (#3117)

Reverts paritytech/polkadot-sdk#2302. 🤦‍♂️ should have checked the
migration CI first.

We either need to reduce the `max_message_size` for the open HRMP
channels on the failing chains or increase the `PageSize` of the XCMP
queue.
Both would be fine on a test-net, but i assume this will also fail
before the next SP runtime upgrade so first need to think what best to
do.
AFAIK its not possible currently to change the `max_message_size` of an
open HRMP channel.

cumulus/parachains/runtimes/contracts/contracts-rococo/src/lib.rs

@@ -104,8 +104,7 @@ pub type Migrations = (
 	cumulus_pallet_xcmp_queue::migration::v3::MigrationToV3<Runtime>,
 	pallet_contracts::Migration<Runtime>,
 	// unreleased
-	cumulus_pallet_xcmp_queue::migration::v4::MigrateV3ToV4<Runtime>,
-	cumulus_pallet_xcmp_queue::migration::v5::MigrateV4ToV5<Runtime>,
+	cumulus_pallet_xcmp_queue::migration::v4::MigrationToV4<Runtime>,
 );
 
 type EventRecord = frame_system::EventRecord<

cumulus/parachains/runtimes/contracts/contracts-rococo/src/xcm_config.rs

@@ -281,9 +281,7 @@ impl cumulus_pallet_xcmp_queue::Config for Runtime {
 		cumulus_primitives_core::ParaId,
 		parachains_common::message_queue::ParaIdToSibling,
 	>;
-	type MaxInboundSuspended = ConstU32<1_000>;
-	type MaxActiveOutboundChannels = ConstU32<128>;
-	type MaxPageSize = ConstU32<{ 1 << 16 }>;
+	type MaxInboundSuspended = sp_core::ConstU32<1_000>;
 	type ControllerOrigin = EitherOfDiverse<
 		EnsureRoot<AccountId>,
 		EnsureXcm<IsMajorityOfBody<RelayLocation, ExecutiveBody>>,
@@ -293,11 +291,6 @@ impl cumulus_pallet_xcmp_queue::Config for Runtime {
 	type PriceForSiblingDelivery = PriceForSiblingParachainDelivery;
 }
 
-impl cumulus_pallet_xcmp_queue::migration::v5::V5Config for Runtime {
-	// This must be the same as the `ChannelInfo` from the `Config`:
-	type ChannelList = ParachainSystem;
-}
-
 parameter_types! {
 	pub const RelayOrigin: AggregateMessageOrigin = AggregateMessageOrigin::Parent;
 }