Celery tests are failing, code is drifting out of date with upstream celery

[alexgleith]

Expected behaviour

Celery tests and code that uses celery should be updated if it's being used. It doesn't seem to be being used.

We should deprecate celery executors and disable tests.

Actual behaviour

Celery tests work to test useful code.

Steps to reproduce the behaviour

Run tests in Docker...

[alexgleith]

Pinning celery to 4.4.7 may fix the skipped test.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[alexgleith]

I still think we should delete the celery code!

[Kirill888]

@alexgleith then re-open the issue and add pinned tag

[SpacemanPaul]

Celery has been deprecated - will remove after 1.8.7 release.