See here for details: https://developers.google.com/webmaster-tools/v3/sitemaps/delete
The URL of the website you are deleting the sitemap from. Must include protocol (http://).
The URL of the sitemap to delete. Must include protocol (http://).
TRUE if successful, raises an error if not.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.