Fix various linter errors

src/notifications.js

@@ -2,7 +2,6 @@ import assert from 'node:assert';
 import AuditSource from './auditsource.js';
 import BoxError from './boxerror.js';
 import changelog from './changelog.js';
-import constants from './constants.js';
 import dashboard from './dashboard.js';
 import database from './database.js';
 import debugModule from 'debug';