Remove deprecated Rails route to full sized Design Management design in GitLab 13.0
!25781 (merged) changed the Rails route for the app to serve a raw (full-size) Design Management design image.
Because the old route was exposed in the REST and GraphQL APIs, a redirection from the old route to the new route was added in order to support any clients that had cached the old route, or otherwise were referring to the old route.
This redirection should be removed in 13.0, which due to being a major release, allows us to make breaking changes.
Before we make this change, check our logs to see if the deprecated URI has been accessed. We can make a decision then about whether this URI is being accessed on GitLab.com, and whether that influences our decision to remove it.
Edited by Luke Duncalfe