Remove part of the code for standalone GitLab CI

Part of long standing issue #792 (closed)

I am trying to be cautious here and not remove too much from the package.

Idea is to have 2 stages:

1. This MR is first and removes the minimal amount of code. This will remove gitlab-ci build that takes time and the parts of the code that depend on it. Additionally it removes recipes that no longer run or are no longer needed.
2. In 9.0 I propose to remove all gitlab-ci mentions in the code which includes the temporary recipes written for the purpose of migration.