Remove boxed error from CustomError.

src/error/error.rs

@@ -10,7 +10,6 @@ pub enum CustomError {
     Text(String),
     Static(&'static str),
     IO(std::io::Error),
-    BoxedError(Box<dyn std::error::Error>),
     Parser(ErrorKind),
 }
 
@@ -36,9 +35,3 @@ impl From<&'static str> for CustomError {
         CustomError::Static(value)
     }
 }
-
-impl From<Box<dyn std::error::Error>> for CustomError {
-    fn from(value: Box<dyn std::error::Error>) -> Self {
-        CustomError::BoxedError(value)
-    }
-}