diff --git a/ssz-rs/src/lib.rs b/ssz-rs/src/lib.rs
index e415b144..b43e7e6a 100644
--- a/ssz-rs/src/lib.rs
+++ b/ssz-rs/src/lib.rs
@@ -68,10 +68,10 @@ mod lib {
             array::TryFromSliceError,
             fmt::{Debug, Display, Formatter},
             ops::{Deref, DerefMut, Index, IndexMut},
-            slice::{IterMut, SliceIndex},
+            slice::SliceIndex,
             str::FromStr,
         },
-        iter::{Enumerate, ExactSizeIterator},
+        iter::ExactSizeIterator,
     };
 
     #[cfg(not(feature = "std"))]
diff --git a/ssz-rs/src/serde.rs b/ssz-rs/src/serde.rs
index 42bd939e..f0632687 100644
--- a/ssz-rs/src/serde.rs
+++ b/ssz-rs/src/serde.rs
@@ -3,34 +3,8 @@ use hex::FromHexError;
 
 const HEX_ENCODING_PREFIX: &str = "0x";
 
-#[derive(Debug)]
-pub enum HexError {
-    Hex(FromHexError),
-    MissingPrefix,
-}
-
-impl fmt::Display for HexError {
-    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
-        match self {
-            Self::Hex(e) => write!(f, "{e}"),
-            Self::MissingPrefix => {
-                write!(f, "missing prefix `{HEX_ENCODING_PREFIX}` when deserializing hex data")
-            }
-        }
-    }
-}
-
-impl From<FromHexError> for HexError {
-    fn from(e: FromHexError) -> Self {
-        Self::Hex(e)
-    }
-}
-
-#[cfg(feature = "std")]
-impl std::error::Error for HexError {}
-
-pub fn try_bytes_from_hex_str(s: &str) -> Result<Vec<u8>, HexError> {
-    let target = s.strip_prefix(HEX_ENCODING_PREFIX).ok_or(HexError::MissingPrefix)?;
+pub fn try_bytes_from_hex_str(s: &str) -> Result<Vec<u8>, FromHexError> {
+    let target = s.strip_prefix(HEX_ENCODING_PREFIX).unwrap_or(s);
     let data = hex::decode(target)?;
     Ok(data)
 }