Need to also remove the prepare_assets constraint, no longer needed.

I have literately no clue what's going on with the imports, but I added them to the files missing them and it compiles now.

Ok so the way rust works, adding use foo to lib.rs means any sub-module of bevy_pbr (e.g. bevy_pbr::render::mesh) can access foo by doing use crate::foo or use crate::*.

Not really what I intended, but oh well.

confirmed that the errors are no longer logged