I dont have any idea about joomla. I want to remove itemtype="http://schema.org/Article" from one article. As suggested in this link https://www.tassos.gr/joomla-extensions/google-structured-data-markup/docs/how-to-remove-the-default-joomla-microdata I removed it from /components/com_content/views/article/tmpl/default.php page but still it's there only. please help me, if anyone have idea about it. Thanks.
Check to see if your template has a template override, so like /template/TEMPLATE_NAME/html/com_content/article/default.php. If so, do the same thing there.