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/beacon_chain/src/metrics.rs

@@ -972,22 +972,6 @@ lazy_static! {
             "beacon_pre_finalization_block_lookup_count",
             "Number of block roots subject to single block lookups"
         );
-
-    /*
-     * Blob sidecar Verification
-     */
-    pub static ref BLOBS_SIDECAR_PROCESSING_REQUESTS: Result<IntCounter> = try_create_int_counter(
-        "beacon_blobs_sidecar_processing_requests_total",
-        "Count of all blob sidecars submitted for processing"
-    );
-    pub static ref BLOBS_SIDECAR_PROCESSING_SUCCESSES: Result<IntCounter> = try_create_int_counter(
-        "beacon_blobs_sidecar_processing_successes_total",
-        "Number of blob sidecars verified for gossip"
-    );
-    pub static ref BLOBS_SIDECAR_GOSSIP_VERIFICATION_TIMES: Result<Histogram> = try_create_histogram(
-        "beacon_blobs_sidecar_gossip_verification_seconds",
-        "Full runtime of blob sidecars gossip verification"
-    );
 }
 
 // Fifth lazy-static block is used to account for macro recursion limit.