Reuse 'kind' parameter.

src/librustc_resolve/lib.rs

@@ -4662,7 +4662,7 @@ fn get_traits_in_module_containing_item(&mut self,
     fn find_transitive_imports(&mut self, mut kind: &NameBindingKind<'_>,
                                trait_name: &Ident) -> SmallVec<[NodeId; 1]> {
         let mut import_ids = smallvec![];
-        while let NameBindingKind::Import { directive, binding, .. } = *kind {
+        while let NameBindingKind::Import { directive, binding, .. } = kind {
             self.maybe_unused_trait_imports.insert(directive.id);
             self.add_to_glob_map(&directive, *trait_name);
             import_ids.push(directive.id);