There's LLVM code that can now be cleaned up, but that'll come as another pass.

Bug: b/130343040
Change-Id: Ie16e296fc1c4d226a81b221d18447cbc09cc2c16
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/28909Tested-by: Ben Clayton <bclayton@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>