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/network/src/metrics.rs

@@ -167,15 +167,6 @@ lazy_static! {
         "beacon_processor_rpc_block_imported_total",
         "Total number of gossip blocks imported to fork choice, etc."
     );
-    // Rpc blobs.
-    pub static ref BEACON_PROCESSOR_RPC_BLOB_QUEUE_TOTAL: Result<IntGauge> = try_create_int_gauge(
-        "beacon_processor_rpc_blob_queue_total",
-        "Count of blobs from the rpc waiting to be verified."
-    );
-    pub static ref BEACON_PROCESSOR_RPC_BLOB_IMPORTED_TOTAL: Result<IntCounter> = try_create_int_counter(
-        "beacon_processor_rpc_blob_imported_total",
-        "Total number of gossip blobs imported."
-    );
     // Chain segments.
     pub static ref BEACON_PROCESSOR_CHAIN_SEGMENT_QUEUE_TOTAL: Result<IntGauge> = try_create_int_gauge(
         "beacon_processor_chain_segment_queue_total",