Remove duplicate remove_outer_derefs and refactor mod deref#573

kkysen wants to merge 5 commits into

tests.refs.fieldsimmunant/c2rust:tests.refs.fieldsfrom

kkysen/tests.refs.fields/remove-outer-deref-refactorimmunant/c2rust:kkysen/tests.refs.fields/remove-outer-deref-refactorCopy head branch name to clipboard