Finish migration to v2 primitives (#5037)

* remove v0 primitives from polkadot-primitives

* first pass: remove v0

* fix fallout in erasure-coding

* remove v1 primitives, consolidate to v2

* the great import update

* update runtime_api_impl_v1 to v2 as well

* guide: add `Version` request for runtime API

* add version query to runtime API

* reintroduce OldV1SessionInfo in a limited way

polkadot/runtime/rococo/src/lib.rs

@@ -34,20 +34,18 @@ use pallet_mmr_primitives as mmr;
 use pallet_session::historical as session_historical;
 use pallet_transaction_payment::{CurrencyAdapter, FeeDetails, RuntimeDispatchInfo};
 use parity_scale_codec::{Decode, Encode, MaxEncodedLen};
-use primitives::{
-	v1::{
-		AccountId, AccountIndex, Balance, BlockNumber, CandidateEvent, CommittedCandidateReceipt,
-		CoreState, GroupRotationInfo, Hash, Id, InboundDownwardMessage, InboundHrmpMessage, Moment,
-		Nonce, OccupiedCoreAssumption, PersistedValidationData, ScrapedOnChainVotes, Signature,
-		ValidationCode, ValidationCodeHash, ValidatorId, ValidatorIndex, ValidatorSignature,
-	},
-	v2::{PvfCheckStatement, SessionInfo as SessionInfoData},
+use primitives::v2::{
+	AccountId, AccountIndex, Balance, BlockNumber, CandidateEvent, CommittedCandidateReceipt,
+	CoreState, GroupRotationInfo, Hash, Id, InboundDownwardMessage, InboundHrmpMessage, Moment,
+	Nonce, OccupiedCoreAssumption, PersistedValidationData, PvfCheckStatement, ScrapedOnChainVotes,
+	SessionInfo as SessionInfoData, Signature, ValidationCode, ValidationCodeHash, ValidatorId,
+	ValidatorIndex, ValidatorSignature,
 };
 use runtime_common::{
 	assigned_slots, auctions, crowdloan, impls::ToAuthor, paras_registrar, paras_sudo_wrapper,
 	slots, BlockHashCount, BlockLength, BlockWeights, RocksDbWeight, SlowAdjustingFeeUpdate,
 };
-use runtime_parachains::{self, runtime_api_impl::v1 as runtime_api_impl};
+use runtime_parachains::{self, runtime_api_impl::v2 as runtime_api_impl};
 use scale_info::TypeInfo;
 use sp_core::{OpaqueMetadata, RuntimeDebug};
 use sp_runtime::{
@@ -213,7 +211,7 @@ impl_opaque_keys! {
 construct_runtime! {
 	pub enum Runtime where
 		Block = Block,
-		NodeBlock = primitives::v1::Block,
+		NodeBlock = primitives::v2::Block,
 		UncheckedExtrinsic = UncheckedExtrinsic
 	{
 		System: frame_system,
@@ -1218,7 +1216,7 @@ sp_api::impl_runtime_apis! {
 
 		fn check_validation_outputs(
 			para_id: Id,
-			outputs: primitives::v1::CandidateCommitments,
+			outputs: primitives::v2::CandidateCommitments,
 		) -> bool {
 			runtime_api_impl::check_validation_outputs::<Runtime>(para_id, outputs)
 		}