fix: remove unused module

Author: SupernaviX

Cargo.lock

@@ -18,7 +18,6 @@ async-trait = "0.1"
 config = { workspace = true }
 dashmap = { workspace = true }
 fjall = "2.7.0"
-serde = { workspace = true }
 serde_cbor = "0.11.2"
 sled = "0.34.7"
 tokio = { workspace = true }