[turbofan] Fix obsolete workaround for type system in simplified lowering.
[turbofan] Fix obsolete workaround for type system in simplified lowering.

Ranges and bitset types now work together, so we don't need these weird
hacks anymore.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/994283005

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#27237}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh