primitives: remove random_seed from BlockBuilder API (#8718)

* primitives: remove random_seed from BlockBuilderApi

* node: remove random_seed

* primitives: bump BlockBuilderApi version

* client: rpc: fix test

substrate/bin/node/runtime/src/lib.rs

@@ -32,7 +32,7 @@ use frame_support::{
 		DispatchClass,
 	},
 	traits::{
-		Currency, Imbalance, KeyOwnerProofSystem, OnUnbalanced, Randomness, LockIdentifier,
+		Currency, Imbalance, KeyOwnerProofSystem, OnUnbalanced, LockIdentifier,
 		U128CurrencyToVote,
 	},
 };
@@ -1228,10 +1228,6 @@ impl_runtime_apis! {
 		fn check_inherents(block: Block, data: InherentData) -> CheckInherentsResult {
 			data.check_extrinsics(&block)
 		}
-
-		fn random_seed() -> <Block as BlockT>::Hash {
-			pallet_babe::RandomnessFromOneEpochAgo::<Runtime>::random_seed().0
-		}
 	}
 
 	impl sp_transaction_pool::runtime_api::TaggedTransactionQueue<Block> for Runtime {