1) The latest version of XStore theme is 7.2.11. So, if you use the latest version of the theme you won’t see any notification in the Dashboard > Updates.
2) If you use auto-updates you don’t need Envato Market plugin. If you want to use that plugin to update the theme you can find the link here https://xstore.helpscoutdocs.com/article/63-theme-update
3) What exactly don’t you want to remove?
