--- a/src/constants.rs	Tue Jun 03 01:21:59 2025 -0400
+++ b/src/constants.rs	Tue Jun 03 21:54:58 2025 -0400
@@ -6,6 +6,7 @@
 use num_traits::FromPrimitive;
 use std::any;
 use std::marker::PhantomData;
+use std::result::Result as StdResult;
 
 bitflags! {
     /// The available PAM flags.
@@ -137,7 +138,7 @@
 }
 
 /// A PAM-specific Result type with an [ErrorCode] error.
-pub type Result<T> = std::result::Result<T, ErrorCode>;
+pub type Result<T> = StdResult<T, ErrorCode>;
 
 impl ErrorCode {
     /// Converts this [Result] into a C-compatible result code.
@@ -161,7 +162,7 @@
 impl TryFrom<c_int> for ErrorCode {
     type Error = InvalidEnum<Self>;
 
-    fn try_from(value: c_int) -> std::result::Result<Self, Self::Error> {
+    fn try_from(value: c_int) -> StdResult<Self, Self::Error> {
         Self::from_i32(value).ok_or(value.into())
     }
 }
@@ -193,18 +194,6 @@
 /// Returned when text that should not have any `\0` bytes in it does.
 /// Analogous to [`std::ffi::NulError`], but the data it was created from
 /// is borrowed.
-#[derive(Debug, thiserror::Error)]
-#[error("null byte within input at byte {0}")]
-pub struct NulError(pub usize);
-
-/// Returned when trying to fit too much data into a binary message.
-#[derive(Debug, thiserror::Error)]
-#[error("cannot create a message of {actual} bytes; maximum is {max}")]
-pub struct TooBigError {
-    pub actual: usize,
-    pub max: usize,
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;