Remove unused Kusama Snowbridge code (#411)

Kusama does not have Ethereum Snowbridge deployed. This commit removes
all that unused code.

If we decide to deploy Kusama<>Ethereum bridge, we can bring it back.

---------

Signed-off-by: Adrian Catangiu <adrian@parity.io>
Co-authored-by: Branislav Kontur <bkontur@gmail.com>
Co-authored-by: fellowship-merge-bot[bot] <151052383+fellowship-merge-bot[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -114,6 +114,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Remove deprecated calls from treasury pallet ([runtimes#381](https://github.com/polkadot-fellows/runtimes/pull/381), [SDK v1.14 #3820](https://github.com/paritytech/polkadot-sdk/pull/3820)).
 - Treasury pallet: - remove unused config parameters ([runtimes#381](https://github.com/polkadot-fellows/runtimes/pull/381), [SDK v1.14 #4831](https://github.com/paritytech/polkadot-sdk/pull/4831)).
 - Remove Identity from Polkadot Relay Chain ([runtimes#415](https://github.com/polkadot-fellows/runtimes/pull/415))
+- Kusama: Remove unused Snowbridge code and configs ([polkadot-fellows/runtimes#411](https://github.com/polkadot-fellows/runtimes/pull/411)
 
 #### From [#322](https://github.com/polkadot-fellows/runtimes/pull/322):
 

integration-tests/emulated/chains/parachains/bridges/bridge-hub-kusama/src/genesis.rs

@@ -65,11 +65,6 @@ pub fn genesis() -> Storage {
 			owner: Some(get_account_id_from_seed::<sr25519::Public>(accounts::BOB)),
 			..Default::default()
 		},
-		ethereum_system: bridge_hub_kusama_runtime::EthereumSystemConfig {
-			para_id: PARA_ID.into(),
-			asset_hub_para_id: ASSET_HUB_PARA_ID.into(),
-			..Default::default()
-		},
 		..Default::default()
 	};
 

integration-tests/emulated/chains/parachains/bridges/bridge-hub-kusama/src/lib.rs

@@ -41,9 +41,6 @@ decl_test_parachains! {
 		pallets = {
 			PolkadotXcm: bridge_hub_kusama_runtime::PolkadotXcm,
 			Balances: bridge_hub_kusama_runtime::Balances,
-			EthereumSystem: bridge_hub_kusama_runtime::EthereumSystem,
-			EthereumInboundQueue: bridge_hub_kusama_runtime::EthereumInboundQueue,
-			EthereumOutboundQueue: bridge_hub_kusama_runtime::EthereumOutboundQueue,
 		}
 	},
 }

integration-tests/emulated/tests/bridges/bridge-hub-kusama/src/tests/mod.rs

@@ -18,7 +18,6 @@ use crate::*;
 mod asset_transfers;
 mod claim_assets;
 mod send_xcm;
-mod snowbridge;
 mod teleport;
 
 pub(crate) fn asset_hub_polkadot_location() -> Location {