If you've just updated a page either refreshing your browser or clearing your browser's cache should sort this. To clear the cache, please see our How can I clear my browser cache, cookies & history guide.
If the page shouldn't be there at all try clearing your cache first. If this doesn't work you may need to manually delete the page using File Manager. Once you've accessed File Manager use our How do I manage my files using File Manager? guide to delete the page.
If you don't know the file name of the page, it's the last part of the web address. For instance, for ttp://www.yourdomain.com/example.html the file name of the page is example.html.