Revert "Network protocol upgrades (#2345)" (#2388)

## Issue Addressed

NA

## Proposed Changes

Reverts #2345 in the interests of getting v1.4.0 out this week. Once we have released that, we can go back to testing this again.

## Additional Info

NA

beacon_node/eth2_libp2p/src/config.rs

@@ -163,7 +163,6 @@ impl Default for Config {
             .query_parallelism(5)
             .disable_report_discovered_peers()
             .ip_limit() // limits /24 IP's in buckets.
-            .incoming_bucket_limit(8) // half the bucket size
             .ping_interval(Duration::from_secs(300))
             .build();