What's the minimum set of files I need in the SteamVR package?

I see a whole bunch of stuff in the SteamVR package, but I'm not sure what I strictly need to work (and I don't want to nuke something which appears to be unnecessary but turns out to be necessary for some feature I'll need in a month). Can I just kill the InteractionSystem folder, the Textures folder, the Materials folder? Do I need the shaders (in the Resources folder)? Can I get by with just only the Editor, Prefabs, and Scripts folders?