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>

consensus/state_processing/src/common/slash_validator.rs

@@ -50,12 +50,11 @@ pub fn slash_validator<T: EthSpec>(
         validator_effective_balance.safe_div(spec.whistleblower_reward_quotient)?;
     let proposer_reward = match state {
         BeaconState::Base(_) => whistleblower_reward.safe_div(spec.proposer_reward_quotient)?,
-        BeaconState::Altair(_)
-        | BeaconState::Merge(_)
-        | BeaconState::Capella(_)
-        | BeaconState::Eip4844(_) => whistleblower_reward
-            .safe_mul(PROPOSER_WEIGHT)?
-            .safe_div(WEIGHT_DENOMINATOR)?,
+        BeaconState::Altair(_) | BeaconState::Merge(_) | BeaconState::Capella(_) => {
+            whistleblower_reward
+                .safe_mul(PROPOSER_WEIGHT)?
+                .safe_div(WEIGHT_DENOMINATOR)?
+        }
     };
 
     // Ensure the whistleblower index is in the validator registry.