Remove dead code (#1516)

This code is no longer used after #1443 (genesis file)

utils/Cargo.toml

@@ -23,6 +23,3 @@ surf = "2.3.2"
 tempfile = "3.9.0"
 tracing = "0.1.37"
 url = "2.3.1"
-
-[dev-dependencies]
-bincode = { workspace = true }

utils/src/lib.rs

@@ -11,7 +11,6 @@ use ethers::{
     signers::{coins_bip39::English, Signer as _},
     types::U256,
 };
-use serde::{Deserialize as _, Serialize as _};
 use std::path::{Path, PathBuf};
 use std::time::Duration;
 use std::{
@@ -350,31 +349,6 @@ macro_rules! impl_to_fixed_bytes {
     };
 }
 
-/// Serialize a U256 type as a decimal string for human readable serialization
-pub fn serialize_as_decimal<S>(value: &U256, serializer: S) -> Result<S::Ok, S::Error>
-where
-    S: serde::Serializer,
-{
-    if serializer.is_human_readable() {
-        serializer.serialize_str(&value.to_string())
-    } else {
-        value.serialize(serializer)
-    }
-}
-
-/// Deserialize a U256 type from a decimal string for human readable serialization
-pub fn deserialize_from_decimal<'de, D>(deserializer: D) -> Result<U256, D::Error>
-where
-    D: serde::Deserializer<'de>,
-{
-    if deserializer.is_human_readable() {
-        let s = String::deserialize(deserializer)?;
-        U256::from_dec_str(&s).map_err(serde::de::Error::custom)
-    } else {
-        U256::deserialize(deserializer)
-    }
-}
-
 /// send a transaction and wait for confirmation before returning the tx receipt and block included.
 pub async fn contract_send<M: Middleware, T: Detokenize, E>(
     call: &ContractCall<M, T>,
@@ -467,8 +441,6 @@ async fn wait_for_transaction_to_be_mined<P: JsonRpcClient>(
 mod test {
     use super::*;
     use committable::RawCommitmentBuilder;
-    use serde::{Deserialize, Serialize};
-    use serde_json::Value;
 
     struct TestCommittable;
 
@@ -485,38 +457,4 @@ mod test {
             u256_to_commitment(commitment_to_u256(TestCommittable.commit())).unwrap()
         );
     }
-    #[derive(Debug, Serialize, Deserialize, PartialEq)]
-    struct AsDecimal(
-        #[serde(
-            serialize_with = "serialize_as_decimal",
-            deserialize_with = "deserialize_from_decimal"
-        )]
-        U256,
-    );
-
-    #[test]
-    fn test_serde_json_as_decimal() {
-        let value = AsDecimal(U256::from(123));
-        let serialized = serde_json::to_string(&value).unwrap();
-
-        // The value is serialized as decimal string
-        let json_value: Value = serde_json::from_str(&serialized).unwrap();
-        assert_eq!(json_value.as_str().unwrap(), "123");
-
-        // Deserialization produces the original value
-        let deserialized: AsDecimal = serde_json::from_str(&serialized).unwrap();
-        assert_eq!(deserialized, value);
-    }
-
-    #[test]
-    fn test_serde_bincode_unchanged() {
-        #[derive(Debug, Serialize, Deserialize, PartialEq)]
-        struct AsDefault(U256);
-        let custom = AsDecimal(U256::from(123));
-        let default = AsDefault(U256::from(123));
-        assert_eq!(
-            bincode::serialize(&custom).unwrap(),
-            bincode::serialize(&default).unwrap(),
-        );
-    }
 }