Archive repository instead of removing assets from it

[maguesse]

Hi,

Although I understand that is a deprecated capability, I think that deleting assets contradicts git's philosophy. Wouldn' it be better to add a "deprecated" badge to the repository Readme and archive the repository. That way it will be made clear that this feature is deprecated, but users still be able to have a look on this cc-docker-build was implemented at the time.

With kind regards,
Mathieu