📝 Docs: update _custom.js notes

assets/js/_custom.js

@@ -30,7 +30,6 @@ const CustomJS = new (function () {
   CustomJS.init();
   // It will be executed when the DOM tree is built.
   document.addEventListener('DOMContentLoaded', () => {
-    // Listen to any DOM change and automatically perform spacing via MutationObserver()
     console.log('DOMContentLoaded!')
   });
 })();