[rocm-libraries] ROCm/rocm-libraries#4019 (commit 34092f4)

fix(integration): Remove unused CI files

## Motivation

These gitlab CI files were only used by StreamHPC, but we have moved
away from using them also, so they can be removed.

## Submission Checklist

- [x] Look over the contributing guidelines at
https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

Co-authored-by: Nemi Verploegh <nemi.verploegh@streamhpc.com>

Author: 2 people