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>

common/eth2/src/lib.rs

@@ -1395,32 +1395,6 @@ impl BeaconNodeHttpClient {
         self.get(path).await
     }
 
-    /// `GET v1/validator/blocks_and_blobs/{slot}`
-    pub async fn get_validator_blocks_and_blobs<T: EthSpec, Payload: AbstractExecPayload<T>>(
-        &self,
-        slot: Slot,
-        randao_reveal: &SignatureBytes,
-        graffiti: Option<&Graffiti>,
-    ) -> Result<ForkVersionedResponse<BlocksAndBlobs<T, Payload>>, Error> {
-        let mut path = self.eth_path(V1)?;
-
-        path.path_segments_mut()
-            .map_err(|()| Error::InvalidUrl(self.server.clone()))?
-            .push("validator")
-            .push("blocks_and_blobs")
-            .push(&slot.to_string());
-
-        path.query_pairs_mut()
-            .append_pair("randao_reveal", &randao_reveal.to_string());
-
-        if let Some(graffiti) = graffiti {
-            path.query_pairs_mut()
-                .append_pair("graffiti", &graffiti.to_string());
-        }
-
-        self.get(path).await
-    }
-
     /// `GET v2/validator/blinded_blocks/{slot}`
     pub async fn get_validator_blinded_blocks<T: EthSpec, Payload: AbstractExecPayload<T>>(
         &self,