Cleanup consensus/types re-exports (#8643)

Removes some of the temporary re-exports in `consensus/types`.

I am doing this in multiple parts to keep each diff small.


Co-Authored-By: Mac L <mjladson@pm.me>

beacon_node/operation_pool/src/lib.rs

@@ -39,8 +39,8 @@ use typenum::Unsigned;
 use types::{
     AbstractExecPayload, Attestation, AttestationData, AttesterSlashing, BeaconState,
     BeaconStateError, ChainSpec, Epoch, EthSpec, ProposerSlashing, SignedBeaconBlock,
-    SignedBlsToExecutionChange, SignedVoluntaryExit, Slot, SyncAggregate,
-    SyncCommitteeContribution, Validator, sync_aggregate::Error as SyncAggregateError,
+    SignedBlsToExecutionChange, SignedVoluntaryExit, Slot, SyncAggregate, SyncAggregateError,
+    SyncCommitteeContribution, Validator,
 };
 
 type SyncContributions<E> = RwLock<HashMap<SyncAggregateId, Vec<SyncCommitteeContribution<E>>>>;