Fix rebase

Author: petrochenkov

src/librustc_lint/builtin.rs

@@ -831,7 +831,7 @@ impl UnusedDocComment {
 
             let span = sugared_span.take().unwrap_or_else(|| attr.span);
 
-            if attr.name() == "doc" {
+            if attr.check_name("doc") {
                 let mut err = cx.struct_span_lint(UNUSED_DOC_COMMENTS, span, "unused doc comment");
 
                 err.span_label(

src/libsyntax/parse/attr.rs

@@ -267,8 +267,6 @@ impl<'a> Parser<'a> {
 
     /// matches meta_item_inner : (meta_item | UNSUFFIXED_LIT) ;
     fn parse_meta_item_inner(&mut self) -> PResult<'a, ast::NestedMetaItem> {
-        let lo = self.span;
-
         match self.parse_unsuffixed_lit() {
             Ok(lit) => {
                 return Ok(ast::NestedMetaItem::Literal(lit))