fix: compilation warnings

src/circom/circuit.rs

@@ -1,8 +1,8 @@
-use std::{collections::HashMap, f32::consts::E};
+use std::collections::HashMap;
 
 use ark_ff::PrimeField;
 use ark_relations::r1cs::{
-    self, ConstraintSynthesizer, ConstraintSystemRef, LinearCombination, SynthesisError, Variable,
+    ConstraintSynthesizer, ConstraintSystemRef, LinearCombination, SynthesisError, Variable,
 };
 
 use color_eyre::Result;

src/witness/circom.rs

@@ -28,6 +28,7 @@ pub trait Circom {
     fn get_ptr_raw_prime(&self) -> Result<u32>;
 }
 
+#[cfg(feature = "circom-2")]
 pub trait Circom2 {
     fn get_field_num_len32(&self) -> Result<u32>;
     fn get_raw_prime(&self) -> Result<()>;