remove account derivation functions (#1498)

bridges/primitives/chain-rialto-parachain/src/lib.rs

@@ -29,7 +29,7 @@ use frame_support::{
 use frame_system::limits;
 use sp_core::Hasher as HasherT;
 use sp_runtime::{
-	traits::{BlakeTwo256, Convert, IdentifyAccount, Verify},
+	traits::{BlakeTwo256, IdentifyAccount, Verify},
 	FixedU128, MultiSignature, MultiSigner, Perbill,
 };
 use sp_std::vec::Vec;
@@ -161,15 +161,6 @@ impl Chain for RialtoParachain {
 	}
 }
 
-/// Convert a 256-bit hash into an AccountId.
-pub struct AccountIdConverter;
-
-impl Convert<sp_core::H256, AccountId> for AccountIdConverter {
-	fn convert(hash: sp_core::H256) -> AccountId {
-		hash.to_fixed_bytes().into()
-	}
-}
-
 frame_support::parameter_types! {
 	pub BlockLength: limits::BlockLength =
 		limits::BlockLength::max_with_normal_ratio(5 * 1024 * 1024, NORMAL_DISPATCH_RATIO);
@@ -218,19 +209,6 @@ pub const TO_RIALTO_PARACHAIN_MESSAGE_DETAILS_METHOD: &str =
 pub const FROM_RIALTO_PARACHAIN_MESSAGE_DETAILS_METHOD: &str =
 	"FromRialtoParachainInboundLaneApi_message_details";
 
-// We use this to get the account on RialtoParachain (target) which is derived from Millau's
-// (source) account. We do this so we can fund the derived account on RialtoParachain at Genesis to
-// it can pay transaction fees.
-//
-// The reason we can use the same `AccountId` type for both chains is because they share the same
-// development seed phrase.
-//
-// Note that this should only be used for testing.
-pub fn derive_account_from_millau_id(id: bp_runtime::SourceAccount<AccountId>) -> AccountId {
-	let encoded_id = bp_runtime::derive_account_id(bp_runtime::MILLAU_CHAIN_ID, id);
-	AccountIdConverter::convert(encoded_id)
-}
-
 sp_api::decl_runtime_apis! {
 	/// API for querying information about the finalized RialtoParachain headers.
 	///