Remove includes/{tool}.yml templates

We should remove these templates since we have the same in gitlab-ce. There doesn't seem to be any benefit of keeping duplicate templates.

https://gitlab.com/gitlab-org/gitlab-ce/tree/master/lib/gitlab/ci/templates/Security

We can use those templates in our test projects.

Related issue number

https://gitlab.com/gitlab-org/security-products/release/issues/84