Fix clippy with latest nightly

src/ciphersuite.rs

@@ -1,6 +1,7 @@
 //! The ciphersuite module to parameterize ICE-FROST sessions.
 
 use core::fmt::Debug;
+#[cfg(not(feature = "std"))]
 use core::marker::{Send, Sync};
 
 use aead::{Aead, KeyInit};

src/dkg/key_generation.rs

@@ -1185,15 +1185,11 @@ impl<C: CipherSuite> DistributedKeyGeneration<RoundTwo, C> {
 
 #[cfg(test)]
 mod test {
-    use core::ops::Mul;
-
     use super::*;
     use crate::dkg::{ComplaintProof, NizkPokOfSecretKey};
     use crate::keys::IndividualVerifyingKey;
     use crate::testing::Secp256k1Sha256;
-    use crate::{FromBytes, ToBytes};
 
-    use ark_ec::Group;
     use ark_ff::UniformRand;
     use ark_secp256k1::{Fr, Projective};
 

src/dkg/nizkpok.rs

@@ -95,7 +95,6 @@ mod test {
     use super::*;
     use crate::testing::Secp256k1Sha256;
 
-    use ark_ec::Group;
     use ark_secp256k1::{Fr, Projective};
     use core::ops::Mul;
     use rand::{rngs::OsRng, RngCore};

src/dkg/secret_share.rs

@@ -370,7 +370,7 @@ mod test {
 
     use ark_ff::UniformRand;
     use ark_secp256k1::Fr;
-    use rand::{rngs::OsRng, RngCore};
+    use rand::rngs::OsRng;
 
     #[test]
     fn test_serialization() {

src/lib.rs

@@ -1588,7 +1588,7 @@
 //! let verified = threshold_signature.verify(alice_group_key, &message_hash)?;
 //! ```
 
-#![cfg_attr(not(feature = "std"), no_std)]
+#![no_std]
 #![cfg_attr(docsrs, feature(doc_cfg))]
 #![deny(rustdoc::broken_intra_doc_links)]
 #![deny(missing_debug_implementations)]

src/sign/precomputation.rs

@@ -232,13 +232,10 @@ mod test {
     use super::*;
     use crate::testing::Secp256k1Sha256;
 
-    use ark_ec::{CurveGroup, Group};
     use ark_ff::UniformRand;
     use ark_secp256k1::{Fr, Projective};
     use rand::rngs::OsRng;
 
-    use core::ops::Mul;
-
     #[test]
     fn secret_pair() {
         let secret_key = IndividualSigningKey::<Secp256k1Sha256> {

src/sign/signature.rs

@@ -715,7 +715,7 @@ mod test {
 
     use ark_secp256k1::{Fr, Projective};
 
-    use ark_ff::{UniformRand, Zero};
+    use ark_ff::UniformRand;
     use rand::rngs::OsRng;
 
     fn do_keygen(