remove deprecated Error::description

Author: AnderEnder

src/compat.rs

@@ -33,11 +33,7 @@ with_std! {
 
     use Error;
 
-    impl<E: Display + Debug> StdError for Compat<E> {
-        fn description(&self) -> &'static str {
-            "An error has occurred."
-        }
-    }
+    impl<E: Display + Debug> StdError for Compat<E> {}
 
     impl From<Error> for Box<dyn StdError> {
         fn from(error: Error) -> Box<dyn StdError> {

src/result_ext.rs

@@ -28,18 +28,14 @@ pub trait ResultExt<T, E> {
     /// struct CustomError;
     ///
     /// impl Error for CustomError {
-    ///     fn description(&self) -> &str {
-    ///         "My custom error message"
-    ///     }
-    ///
     ///     fn cause(&self) -> Option<&Error> {
     ///         None
     ///     }
     /// }
     /// #
     /// # impl fmt::Display for CustomError {
     /// #     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-    /// #         write!(f, "{}", self.description())
+    /// #         write!(f, "My custom error message")
     /// #     }
     /// # }
     /// #

src/sync_failure.rs

@@ -39,11 +39,7 @@ impl<E: Error + Send + 'static> SyncFailure<E> {
     ///
     /// // implement Display/Error for NonSyncError...
     /// #
-    /// # impl StdError for NonSyncError {
-    /// #     fn description(&self) -> &str {
-    /// #         "oops!"
-    /// #     }
-    /// # }
+    /// # impl StdError for NonSyncError {}
     /// #
     /// # impl Display for NonSyncError {
     /// #     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {