Clean capella (#4019)

## Issue Addressed

Cleans up all the remnants of 4844 in capella. This makes sure when 4844 is reviewed there is nothing we are missing because it got included here 

## Proposed Changes

drop a bomb on every 4844 thing 

## Additional Info

Merge process I did (locally) is as follows:
- squash merge to produce one commit
- in new branch off unstable with the squashed commit create a `git revert HEAD` commit
- merge that new branch onto 4844 with `--strategy ours`
- compare local 4844 to remote 4844 and make sure the diff is empty
- enjoy

Co-authored-by: Paul Hauner <paul@paulhauner.com>

beacon_node/store/src/partial_beacon_state.rs

@@ -15,7 +15,7 @@ use types::*;
 ///
 /// Utilises lazy-loading from separate storage for its vector fields.
 #[superstruct(
-    variants(Base, Altair, Merge, Capella, Eip4844),
+    variants(Base, Altair, Merge, Capella),
     variant_attributes(derive(Debug, PartialEq, Clone, Encode, Decode))
 )]
 #[derive(Debug, PartialEq, Clone, Encode)]
@@ -67,9 +67,9 @@ where
     pub current_epoch_attestations: VariableList<PendingAttestation<T>, T::MaxPendingAttestations>,
 
     // Participation (Altair and later)
-    #[superstruct(only(Altair, Merge, Capella, Eip4844))]
+    #[superstruct(only(Altair, Merge, Capella))]
     pub previous_epoch_participation: VariableList<ParticipationFlags, T::ValidatorRegistryLimit>,
-    #[superstruct(only(Altair, Merge, Capella, Eip4844))]
+    #[superstruct(only(Altair, Merge, Capella))]
     pub current_epoch_participation: VariableList<ParticipationFlags, T::ValidatorRegistryLimit>,
 
     // Finality
@@ -79,13 +79,13 @@ where
     pub finalized_checkpoint: Checkpoint,
 
     // Inactivity
-    #[superstruct(only(Altair, Merge, Capella, Eip4844))]
+    #[superstruct(only(Altair, Merge, Capella))]
     pub inactivity_scores: VariableList<u64, T::ValidatorRegistryLimit>,
 
     // Light-client sync committees
-    #[superstruct(only(Altair, Merge, Capella, Eip4844))]
+    #[superstruct(only(Altair, Merge, Capella))]
     pub current_sync_committee: Arc<SyncCommittee<T>>,
-    #[superstruct(only(Altair, Merge, Capella, Eip4844))]
+    #[superstruct(only(Altair, Merge, Capella))]
     pub next_sync_committee: Arc<SyncCommittee<T>>,
 
     // Execution
@@ -99,20 +99,15 @@ where
         partial_getter(rename = "latest_execution_payload_header_capella")
     )]
     pub latest_execution_payload_header: ExecutionPayloadHeaderCapella<T>,
-    #[superstruct(
-        only(Eip4844),
-        partial_getter(rename = "latest_execution_payload_header_eip4844")
-    )]
-    pub latest_execution_payload_header: ExecutionPayloadHeaderEip4844<T>,
 
     // Capella
-    #[superstruct(only(Capella, Eip4844))]
+    #[superstruct(only(Capella))]
     pub next_withdrawal_index: u64,
-    #[superstruct(only(Capella, Eip4844))]
+    #[superstruct(only(Capella))]
     pub next_withdrawal_validator_index: u64,
 
     #[ssz(skip_serializing, skip_deserializing)]
-    #[superstruct(only(Capella, Eip4844))]
+    #[superstruct(only(Capella))]
     pub historical_summaries: Option<VariableList<HistoricalSummary, T::HistoricalRootsLimit>>,
 }
 
@@ -227,23 +222,6 @@ impl<T: EthSpec> PartialBeaconState<T> {
                 ],
                 [historical_summaries]
             ),
-            BeaconState::Eip4844(s) => impl_from_state_forgetful!(
-                s,
-                outer,
-                Eip4844,
-                PartialBeaconStateEip4844,
-                [
-                    previous_epoch_participation,
-                    current_epoch_participation,
-                    current_sync_committee,
-                    next_sync_committee,
-                    inactivity_scores,
-                    latest_execution_payload_header,
-                    next_withdrawal_index,
-                    next_withdrawal_validator_index
-                ],
-                [historical_summaries]
-            ),
         }
     }
 
@@ -472,22 +450,6 @@ impl<E: EthSpec> TryInto<BeaconState<E>> for PartialBeaconState<E> {
                 ],
                 [historical_summaries]
             ),
-            PartialBeaconState::Eip4844(inner) => impl_try_into_beacon_state!(
-                inner,
-                Eip4844,
-                BeaconStateEip4844,
-                [
-                    previous_epoch_participation,
-                    current_epoch_participation,
-                    current_sync_committee,
-                    next_sync_committee,
-                    inactivity_scores,
-                    latest_execution_payload_header,
-                    next_withdrawal_index,
-                    next_withdrawal_validator_index
-                ],
-                [historical_summaries]
-            ),
         };
         Ok(state)
     }