Disable and remove vagovadmin theme.

[ndouglas]

Description

Right? I don't think we use it. Eh, I'll open a PR and find out.

Tasks

• Turn it off
• Go through config to look for custom code
• Review PR with this turned off but not specifically removed
• If everything looks good, we can fully remove it

Acceptance Criteria

• The theme has been removed and we no longer have to update two copies of everything.
• Needs design review.

[timcosgrove]

It's an active theme. What's up here?

[ndouglas]

Where did you see that this is an active theme?

[ndouglas]

Not sure what "active" means, actually. Locally it appears to be installed and enabled, but not default, which is AFAICT what we want right now.

My understanding is that vagovclaro was supposed to replace vagovadmin, so I opened this issue when I noticed that it was still hanging around. (Before I saw #8950) I also opened #11529 to remove it, and learned some stuff along the way, like that not everything is completely shifted from vagovadmin to vagovclaro. I think. So I think I might be closing #11529 and instead opening a series of smaller PRs to do cleanup and verifying each of those changes individually.