Delete CNAME file to avoid 404 error

The presence of this file was leading to 404 not found errors when visiting codeforphoenix.github.io. Deleting should fix that.

Robert Sese from GitHub points out: "The CNAME file is only necessary for custom domains [1]. The codeforphoenix.github.io URL is the default Organization Pages URL for the codeforphoenix organization so no need for a CNAME file.
[1]: https://help.github.com/articles/setting-up-a-custom-domain-with-github-pages"