How to Delete domain.com/Sitemap.xml.gz Directory ?

Hi,

My Site http://example.com showing 2 Sitemaps

1) http://example.com/sitemap.xml

2) http://example/sitemap.xml.gz

in these two directory, I want to Delete the /sitemap.xml.gz directory and I am unable to Find the Any Option for Delete from Hosting account.

Anyone tell me the Correct method for Deleting this.?

Plugin Name:- Google XML Sitemaps