Update build

- Use default github rust version
- Stop using clippy action, it has been unmaintained since 2020
- No longer enforce nightly fmt rules in CI (they can still be enforced
  in commit hooks or nix
- No longer use cargo test unstable options
- Run `cargo clippy --fix` to fix new errors

subroutines/src/pcs/univariate_kzg/mod.rs

@@ -106,11 +106,9 @@ impl<E: Pairing> PolynomialCommitmentScheme<E> for UnivariateKzgPCS<E> {
         let (num_leading_zeros, plain_coeffs) = skip_leading_zeros(poly);
 
         let msm_time = start_timer!(|| "MSM to compute commitment to plaintext poly");
-        let commitment = E::G1::msm_unchecked(
-            &prover_param.powers_of_g[num_leading_zeros..],
-            &plain_coeffs,
-        )
-        .into_affine();
+        let commitment =
+            E::G1::msm_unchecked(&prover_param.powers_of_g[num_leading_zeros..], plain_coeffs)
+                .into_affine();
         end_timer!(msm_time);
 
         end_timer!(commit_time);
@@ -136,7 +134,7 @@ impl<E: Pairing> PolynomialCommitmentScheme<E> for UnivariateKzgPCS<E> {
 
         let proof = E::G1::msm_unchecked(
             &prover_param.borrow().powers_of_g[num_leading_zeros..],
-            &witness_coeffs,
+            witness_coeffs,
         )
         .into_affine();