This blog post describes how a snippet can be deleted from a single post, page or custom post type.
- Log-in to your WordPress dashboard.
- Edit the post, page or custom post type where the snippet has been added.
- Scroll down to the the “Rich Snippet” metabox.
- If Rich Snippets have been added to the current post, page or custom post, the plugin will ask if you want to load it. Click “Yes”:
- After the snippets have been loaded, click the “Delete” button on the right side.
- Save the page.