docs: simplify changelog

docs/changelogs/v0.33.md

@@ -21,15 +21,7 @@ This release includes some refactorings and improvements affecting Bitswap which
 #### Using default `libp2p_rcmgr`  metrics
 
 Bespoke rcmgr metrics [were removed](https://github.com/ipfs/kubo/pull/9947), Kubo now exposes only the default `libp2p_rcmgr` metrics from go-libp2p.
-This makes it easier to compare Kubo with custom implementations based on go-libp2p. Removed metrics:
-
-```diff
--libp2p_rcmgr_memory_allocations_allowed_total
--libp2p_rcmgr_memory_allocations_blocked_total
--libp2p_rcmgr_peer_blocked_total
--libp2p_rcmgr_peers_allowed_total
-```
-
+This makes it easier to compare Kubo with custom implementations based on go-libp2p.
 If you depended on removed ones, please fill an issue to add them to the upstream [go-libp2p](https://github.com/libp2p/go-libp2p).
 
 #### 📦️ Dependency updates