Remove `lower_to_hir()` call from `prepare_output()`.
Remove `lower_to_hir()` call from `prepare_output()`.

It's a false dependency. The result isn't used and there are no
relevant side-effects.

graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust