Is there something I can run, like Lint, which can detect unused files?

[SelLi]

Hi there everyone - just a simple question,
I was wondering if there was something I could run, like Lint, which can detect unused files.
I've been working on my first project, and it's been a little bit messy. I'm almost certain that I have at least a few images that are never used in the actual game - if possible, I'd like to run something simple like Lint, which would allow me to find and delete the unnecessary files, to slim down the size of the final project.
(Of course, I could try to do this manually, but that would take longer and could lead to more mess - like accidentally deleting files that ARE needed.)
If there isn't something like this, then that's fine, I just thought I'd ask. It's something I could see existing.
Have a nice day!

[dragondatingsim]

Seconded, this would be really useful for creating demos too.

[Ocelot]

First of all, making such a tool, which will accurately work for any kind of RenPy game, is mathematically impossible (it is equivalent to solving halting problem).
On the other hand, if your game does not use DynamicImage, loading from external files, dynamically constructed paths and similar things, it would be possible, but I don't know about such a tool made.