Do not broadcast the parent_block_hash but use it as parameter to the EL

specs/_features/epbs/beacon-chain.md

@@ -130,7 +130,6 @@ class InclusionListSummaryEntry(Container):
 ```python
 class InclusionListSummary(Container)
     proposer_index: ValidatorIndex
-    parent_block_hash: Hash32
     summary: List[InclusionListSummaryEntry, MAX_TRANSACTIONS_PER_INCLUSION_LIST]
 ```
 
@@ -335,6 +334,7 @@ def process_epoch(state: BeaconState) -> None:
 @dataclass
 class NewInclusionListRequest(object):
     inclusion_list: InclusionList
+    parent_block_hash: Hash32
 ```
 
 #### Engine APIs

specs/_features/epbs/fork-choice.md

@@ -33,10 +33,6 @@ def verify_inclusion_list(state: BeaconState, block: BeaconBlock, inclusion_list
     proposer = state.validators[proposer_index]
     assert bls.Verify(proposer.pubkey, signing_root, signed_summary.signature)
 
-    # Check that the parent_hash corresponds to the state's last execution payload header
-    parent_hash = signed_summary.message.parent_block_hash
-    assert parent_hash == state.latest_execution_payload_header.block_hash
-
     # TODO: These checks will also be performed by the EL surely so we can probably remove them from here.
     # Check the summary and transaction list lengths
     summary = signed_summary.message.summary
@@ -49,7 +45,8 @@ def verify_inclusion_list(state: BeaconState, block: BeaconBlock, inclusion_list
     assert total_gas_limit <= MAX_GAS_PER_INCLUSION_LIST
 
     # Check that the inclusion list is valid
-    return execution_engine.notify_new_inclusion_list(inclusion_list) 
+    return execution_engine.notify_new_inclusion_list(NewInclusionListRequest(
+            inclusion_list=inclusion_list, parent_block_hash = state.latest_execution_payload_header.block_hash ))
 ```
 
 ### `is_inclusion_list_available`