Remove deprecated description

mime-parse/src/lib.rs

@@ -86,24 +86,22 @@ impl fmt::Debug for Byte {
 }
 
 impl Error for ParseError {
-    fn description(&self) -> &str {
-        match self {
+}
+
+impl fmt::Display for ParseError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let description = match self {
             ParseError::MissingSlash => "a slash (/) was missing between the type and subtype",
             ParseError::MissingEqual => "an equals sign (=) was missing between a parameter and its value",
             ParseError::MissingQuote => "a quote (\") was missing from a parameter value",
             ParseError::InvalidToken { .. } => "invalid token",
             ParseError::InvalidRange => "unexpected asterisk",
             ParseError::TooLong => "the string is too long",
-        }
-    }
-}
-
-impl fmt::Display for ParseError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        };
         if let ParseError::InvalidToken { pos, byte } = *self {
-            write!(f, "{}, {:?} at position {}", self.description(), byte, pos)
+            write!(f, "{}, {:?} at position {}", description, byte, pos)
         } else {
-            f.write_str(self.description())
+            f.write_str(description)
         }
     }
 }

src/error.rs

@@ -10,13 +10,10 @@ pub struct InvalidMime {
 }
 
 impl Error for InvalidMime {
-    fn description(&self) -> &str {
-        "invalid MIME"
-    }
 }
 
 impl fmt::Display for InvalidMime {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}: {}", self.description(), self.inner)
+        write!(f, "invalid MIME: {}", self.inner)
     }
 }