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/lighthouse_network/src/rpc/outbound.rs

@@ -38,7 +38,6 @@ pub enum OutboundRequest<TSpec: EthSpec> {
     Goodbye(GoodbyeReason),
     BlocksByRange(OldBlocksByRangeRequest),
     BlocksByRoot(BlocksByRootRequest),
-    BlobsByRange(BlobsByRangeRequest),
     LightClientBootstrap(LightClientBootstrapRequest),
     Ping(Ping),
     MetaData(PhantomData<TSpec>),
@@ -77,11 +76,6 @@ impl<TSpec: EthSpec> OutboundRequest<TSpec> {
                 ProtocolId::new(Protocol::BlocksByRoot, Version::V2, Encoding::SSZSnappy),
                 ProtocolId::new(Protocol::BlocksByRoot, Version::V1, Encoding::SSZSnappy),
             ],
-            OutboundRequest::BlobsByRange(_) => vec![ProtocolId::new(
-                Protocol::BlobsByRange,
-                Version::V1,
-                Encoding::SSZSnappy,
-            )],
             OutboundRequest::Ping(_) => vec![ProtocolId::new(
                 Protocol::Ping,
                 Version::V1,
@@ -106,7 +100,6 @@ impl<TSpec: EthSpec> OutboundRequest<TSpec> {
             OutboundRequest::Goodbye(_) => 0,
             OutboundRequest::BlocksByRange(req) => req.count,
             OutboundRequest::BlocksByRoot(req) => req.block_roots.len() as u64,
-            OutboundRequest::BlobsByRange(req) => req.count,
             OutboundRequest::Ping(_) => 1,
             OutboundRequest::MetaData(_) => 1,
             OutboundRequest::LightClientBootstrap(_) => 1,
@@ -120,7 +113,6 @@ impl<TSpec: EthSpec> OutboundRequest<TSpec> {
             OutboundRequest::Goodbye(_) => Protocol::Goodbye,
             OutboundRequest::BlocksByRange(_) => Protocol::BlocksByRange,
             OutboundRequest::BlocksByRoot(_) => Protocol::BlocksByRoot,
-            OutboundRequest::BlobsByRange(_) => Protocol::BlobsByRange,
             OutboundRequest::Ping(_) => Protocol::Ping,
             OutboundRequest::MetaData(_) => Protocol::MetaData,
             OutboundRequest::LightClientBootstrap(_) => Protocol::LightClientBootstrap,
@@ -135,7 +127,6 @@ impl<TSpec: EthSpec> OutboundRequest<TSpec> {
             // variants that have `multiple_responses()` can have values.
             OutboundRequest::BlocksByRange(_) => ResponseTermination::BlocksByRange,
             OutboundRequest::BlocksByRoot(_) => ResponseTermination::BlocksByRoot,
-            OutboundRequest::BlobsByRange(_) => ResponseTermination::BlobsByRange,
             OutboundRequest::LightClientBootstrap(_) => unreachable!(),
             OutboundRequest::Status(_) => unreachable!(),
             OutboundRequest::Goodbye(_) => unreachable!(),
@@ -192,7 +183,6 @@ impl<TSpec: EthSpec> std::fmt::Display for OutboundRequest<TSpec> {
             OutboundRequest::Goodbye(reason) => write!(f, "Goodbye: {}", reason),
             OutboundRequest::BlocksByRange(req) => write!(f, "Blocks by range: {}", req),
             OutboundRequest::BlocksByRoot(req) => write!(f, "Blocks by root: {:?}", req),
-            OutboundRequest::BlobsByRange(req) => write!(f, "Blobs by range: {:?}", req),
             OutboundRequest::Ping(ping) => write!(f, "Ping: {}", ping.data),
             OutboundRequest::MetaData(_) => write!(f, "MetaData request"),
             OutboundRequest::LightClientBootstrap(bootstrap) => {