Nothing reads these, save the SSD R/W cycles!

Change-Id: Ic49a40387672a1e5aaedb169d9d46f61daedc430
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/28353Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>