feat(cat-gateway): Remove unused code cardano/utils.rs (#2598)

* remove unused util mod

* wip

* remove serde

Author: Mr-Leshiy

catalyst-gateway/bin/Cargo.toml

@@ -35,7 +35,6 @@ tracing-subscriber = { version = "0.3.18", features = [
     "time",
     "env-filter",
 ] }
-serde = { version = "1.0.214", features = ["derive"] }
 serde_json = { version = "1.0.132", features = ["arbitrary_precision"] }
 thiserror = "1.0.68"
 chrono = "0.4.38"

catalyst-gateway/bin/src/cardano/mod.rs

@@ -27,9 +27,7 @@ use crate::{
     settings::{chain_follower, Settings},
 };
 
-// pub(crate) mod cip36_registration_obsolete;
 pub(crate) mod event;
-pub(crate) mod util;
 
 /// How long we wait between checks for connection to the indexing DB to be ready.
 pub(crate) const INDEXING_DB_READY_WAIT_INTERVAL: Duration = Duration::from_secs(1);