remove all kind annotations from closures

src/libsyntax/ext/expand.rs

@@ -1089,7 +1089,7 @@ fn expand_annotatable(a: Annotatable,
                     // but that double-mut-borrows fld
                     let mut items: SmallVector<P<ast::Item>> = SmallVector::zero();
                     dec.expand(fld.cx, attr.span, &*attr.node.value, &**it,
-                               box |&mut: item| items.push(item));
+                               box |item| items.push(item));
                     decorator_items.extend(items.into_iter()
                         .flat_map(|item| expand_item(item, fld).into_iter()));
 
@@ -1850,7 +1850,7 @@ mod test {
             assert!((shouldmatch.len() == 0) ||
                     (varrefs.len() > *shouldmatch.iter().max().unwrap()));
             for (idx,varref) in varrefs.iter().enumerate() {
-                let print_hygiene_debug_info = |&:| {
+                let print_hygiene_debug_info = || {
                     // good lord, you can't make a path with 0 segments, can you?
                     let final_varref_ident = match varref.segments.last() {
                         Some(pathsegment) => pathsegment.identifier,