elliptic-curve: fix clippy::unnecessary_safety_comment lint (#2314)

Author: newpavlov

elliptic-curve/src/point/non_identity.rs

@@ -23,7 +23,8 @@ use crate::{BatchNormalize, CurveArithmetic, CurveGroup, NonZeroScalar, Scalar};
 /// In the context of ECC, it's useful for ensuring that certain arithmetic
 /// cannot result in the identity point.
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
-#[repr(transparent)] // SAFETY: needed for `unsafe` safety invariants below
+// `repr` is needed for `unsafe` safety invariants below
+#[repr(transparent)]
 pub struct NonIdentity<P> {
     point: P,
 }

elliptic-curve/src/scalar/nonzero.rs

@@ -33,7 +33,8 @@ use serdect::serde::{Deserialize, Serialize, de, ser};
 /// In the context of ECC, it's useful for ensuring that scalar multiplication
 /// cannot result in the point at infinity.
 #[derive(Clone)]
-#[repr(transparent)] // SAFETY: needed for `unsafe` safety invariants below
+// `repr` is needed for `unsafe` safety invariants below
+#[repr(transparent)]
 pub struct NonZeroScalar<C>
 where
     C: CurveArithmetic,