update lint

Author: santicomp2014

src/annotator/test/guest-test.js

@@ -56,7 +56,6 @@ describe('Guest', () => {
   let fakeSetAllShortcuts;
   let fakeGetAllShortcuts;
   let FakeOutsideAssignmentNoticeController;
-  let fakeIsMacOS;
 
   const createGuest = (config = {}) => {
     const element = document.createElement('div');