chore: revert change to circuit serialization format (#962)

revert: revert change to circuit serialization format

This reverts commit 03a2088.

Cargo.toml

@@ -41,7 +41,6 @@ codespan = "0.9.5"
 codespan-reporting = "0.9.5"
 chumsky = { git = "https://github.com/jfecher/chumsky", rev = "ad9d312" }
 dirs = "4"
-hex = { version = "0.4.2", features = ["serde"] }
 serde = { version = "1.0.136", features = ["derive"] }
 smol_str = "0.1.17"
 thiserror = "1.0.21"

crates/nargo/Cargo.toml

@@ -23,11 +23,11 @@ noirc_abi.workspace = true
 fm.workspace = true
 acvm.workspace = true
 cfg-if.workspace = true
-hex.workspace = true
 toml.workspace = true
 serde.workspace = true
 thiserror.workspace = true
 const_format = "0.2.30"
+hex = "0.4.2"
 serde_json = "1.0"
 termcolor = "1.1.2"
 tempdir = "0.3.7"

crates/noirc_driver/Cargo.toml

@@ -15,4 +15,3 @@ noirc_abi.workspace = true
 acvm.workspace = true
 fm.workspace = true
 serde.workspace = true
-hex.workspace = true

crates/noirc_driver/src/program.rs

@@ -16,14 +16,14 @@ where
     let mut circuit_bytes: Vec<u8> = Vec::new();
     circuit.write(&mut circuit_bytes).unwrap();
 
-    hex::serialize(circuit_bytes, s)
+    circuit_bytes.serialize(s)
 }
 
 fn deserialize_circuit<'de, D>(deserializer: D) -> Result<Circuit, D::Error>
 where
     D: Deserializer<'de>,
 {
-    let circuit_bytes: Vec<u8> = hex::deserialize(deserializer)?;
+    let circuit_bytes = Vec::<u8>::deserialize(deserializer)?;
     let circuit = Circuit::read(&*circuit_bytes).unwrap();
     Ok(circuit)
 }