Remove duplicate templates that are lowercase
What does this MR do?
Removes duplicate lowercase GitLab CI templates (probably added while on a case-insensitive system).
Are there points in the code the reviewer needs to double check?
No.
Why was this MR needed?
Because GitLab CI templates are duplicated: https://gitlab.com/gitlab-org/gitlab-ce/tree/master/vendor/gitlab-ci-yml/Pages