ESLint rules: rules requiring minor changes (#3139)

* implemented trivial code changes necessary batch of rules

Co-authored-by: Andrew Henry <akhenry@gmail.com>

src/plugins/notebook/components/notebook-menu-switcher.vue

@@ -70,7 +70,7 @@ export default {
         document.removeEventListener('click', this.hideMenu);
     },
     methods: {
-        async setNotebookTypes() {
+        setNotebookTypes() {
             const notebookTypes = [];
             const defaultNotebook = getDefaultNotebook();