expansion: Remove unnecessary override from `impl Folder for Marker`

diff --git a/src/libsyntax/ext/expand.rs b/src/libsyntax/ext/expand.rs
index 29030783ca6b848d0c253c019fb30f126f76e4a7..af30c494888091fe005e95a672c546baca1c0686 100644 (file)
--- a/src/libsyntax/ext/expand.rs
+++ b/src/libsyntax/ext/expand.rs
@@ -1569,11 +1569,6 @@ fn proc_macro_non_items = proc_macro_non_items,
 pub struct Marker(pub Mark);
 
 impl Folder for Marker {
-    fn fold_ident(&mut self, mut ident: Ident) -> Ident {
-        ident.span = ident.span.apply_mark(self.0);
-        ident
-    }
-
     fn new_span(&mut self, span: Span) -> Span {
         span.apply_mark(self.0)
     }