check images and delete ones that are not used in any docs

[mishaone]

We have a lot of images that may not be used anymore. We need to go through the lot and (probably manually) check if they're use in the project. If they aren't, they should be deleted.

[rkratky]

Thanks for bringing this up, @mishaone. Reassigning to myself because I have thought about this previously, and I want to include an automated check for this in our validation script.

[mishaone]

Quick addition: can we make the automated checking mechanism adaptable enough to look through all module files and see if they are referenced anywhere? If not, it's probably an outdated module and can be discarded.

[rkratky]

@mishaone Yes, that's the plan, I just forgot to mention it here.