Remove unused empty struct

src/lib.rs

@@ -33,9 +33,6 @@ fn content_type(boundary: &str) -> mime::Mime {
         .expect("Valid mime for content_type")
 }
 
-#[derive(Debug)]
-pub struct Empty;
-
 impl<R> Body<R> {
     pub fn content_type(&self) -> mime::Mime {
         content_type(&self.boundary)