These are no longer used.

Change-Id: I0fde85e2b200663eac2bb32c34f90e78d76ad287
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/30469Tested-by: Chris Forbes <chrisforbes@google.com>
Presubmit-Ready: Chris Forbes <chrisforbes@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>