Remove redundant clone

Author: sinkuu

src/librustc_resolve/build_reduced_graph.rs

@@ -318,7 +318,7 @@ impl<'a, 'cl> Resolver<'a, 'cl> {
                         // This particular use tree
                         &tree, id, &prefix, true,
                         // The whole `use` item
-                        parent_scope.clone(), item, ty::Visibility::Invisible, root_span,
+                        parent_scope, item, ty::Visibility::Invisible, root_span,
                     );
                 }
             }

src/libsyntax/ext/tt/macro_parser.rs

@@ -309,7 +309,7 @@ fn create_matches(len: usize) -> Box<[Rc<NamedMatchVec>]> {
         vec![]
     } else {
         let empty_matches = Rc::new(SmallVec::new());
-        vec![empty_matches.clone(); len]
+        vec![empty_matches; len]
     }.into_boxed_slice()
 }