Remove unused error case

Author: andy128k

CHANGELOG.md

@@ -8,6 +8,7 @@
 - Upgrade `quick_xml` to `0.27` and `derive_builder` to `0.12` [`#67`](https://github.com/rust-syndication/atom/pull/67)
 - Allow to configure emitted XML [`#70`](https://github.com/rust-syndication/atom/pull/70)
 - Switch to Rust 2021 Edition [`#74`](https://github.com/rust-syndication/atom/pull/74)
+- Remove unused error case `Error::Utf8` [`#73`](https://github.com/rust-syndication/atom/pull/73)
 
 ## 0.11.0 - 2021-10-20
 

src/error.rs

@@ -1,15 +1,12 @@
 use std::error::Error as StdError;
 use std::fmt;
-use std::str::Utf8Error;
 
 #[derive(Debug)]
 /// An error that occurred while performing an Atom operation.
 #[non_exhaustive]
 pub enum Error {
     /// Unable to parse XML.
     Xml(XmlError),
-    /// Unable to parse UTF8 in to a string.
-    Utf8(Utf8Error),
     /// Input did not begin with an opening feed tag.
     InvalidStartTag,
     /// Unexpected end of input.
@@ -29,7 +26,6 @@ impl StdError for Error {
     fn source(&self) -> Option<&(dyn StdError + 'static)> {
         match *self {
             Error::Xml(ref err) => Some(err),
-            Error::Utf8(ref err) => Some(err),
             Error::InvalidStartTag => None,
             Error::Eof => None,
             Error::WrongDatetime(_) => None,
@@ -42,7 +38,6 @@ impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match *self {
             Error::Xml(ref err) => fmt::Display::fmt(err, f),
-            Error::Utf8(ref err) => fmt::Display::fmt(err, f),
             Error::InvalidStartTag => write!(f, "input did not begin with an opening feed tag"),
             Error::Eof => write!(f, "unexpected end of input"),
             Error::WrongDatetime(ref datetime) => write!(
@@ -68,12 +63,6 @@ impl From<XmlError> for Error {
     }
 }
 
-impl From<Utf8Error> for Error {
-    fn from(err: Utf8Error) -> Error {
-        Error::Utf8(err)
-    }
-}
-
 #[derive(Debug)]
 pub struct XmlError(quick_xml::Error);