remove redundant error variant

src/parse/error.rs

@@ -1,4 +1,4 @@
-use std::{error::Error as StdError, fmt, io::Error as IoError, num::ParseFloatError};
+use std::{error::Error as StdError, fmt, io::Error as IoError};
 
 /// `Result<_, ParseError>`
 pub type ParseResult<T> = Result<T, ParseError>;
@@ -13,8 +13,6 @@ pub enum ParseError {
     IncorrectFileHeader,
     /// Line in `.osu` that contains a slider was not in the proper format.
     InvalidCurvePoints,
-    /// Expected a decimal number, got something else.
-    InvalidDecimalNumber,
     /// Failed to recognized specified type for hitobjects.
     UnknownHitObjectKind,
 }
@@ -27,7 +25,6 @@ impl fmt::Display for ParseError {
                 write!(f, "expected `osu file format v` at file begin")
             }
             Self::InvalidCurvePoints => f.write_str("invalid curve point"),
-            Self::InvalidDecimalNumber => f.write_str("invalid float number"),
             Self::UnknownHitObjectKind => f.write_str("unsupported hitobject kind"),
         }
     }
@@ -39,7 +36,6 @@ impl StdError for ParseError {
             Self::IoError(inner) => Some(inner),
             Self::IncorrectFileHeader => None,
             Self::InvalidCurvePoints => None,
-            Self::InvalidDecimalNumber => None,
             Self::UnknownHitObjectKind => None,
         }
     }
@@ -50,9 +46,3 @@ impl From<IoError> for ParseError {
         Self::IoError(other)
     }
 }
-
-impl From<ParseFloatError> for ParseError {
-    fn from(_: ParseFloatError) -> Self {
-        Self::InvalidDecimalNumber
-    }
-}