.gitlab-ci.yml: retiring acadia

Acadia, we hardly knew you...

@sly2j Seems like a good time to stop worrying about having to keep material maps for acadia working... Let me know if you want to keep this alive.

assigned to @wdconinc

added 18 commits

• 06275477...b1c0de3c - 17 commits from branch master
• 36df81bb - .gitlab-ci.yml: retiring acadia

Compare with previous version

enabled an automatic merge when the pipeline for 36df81bb succeeds

merged