CI: remove old ubuntu wip

1 job for ci_basic_step in 3 minutes and 36 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Precheck
failed #2216
fast-build

00:03:36

 
Name Stage Failure
failed
fast-build Precheck
 * [new branch]      ci_basic_step -> origin/ci_basic_step
Skipping Git checkout
Skipping Git submodules setup
$ python3 CI/check_twin_pipelines.py
python3: can't open file 'CI/check_twin_pipelines.py': [Errno 2] No such file or directory
Running after script...
$ python3 CI/cdash_handler.py $CI_COMMIT_SHA $CI_PROJECT_ID $CI_PROJECT_DIR $K8S_SECRET_CDASH
python3: can't open file 'CI/cdash_handler.py': [Errno 2] No such file or directory
ERROR: Job failed: exit code 1