It has bitrotted and should be reimplemented with support from the
Reactor back-end if needed again.

Bug swiftshader:10

Change-Id: Ie926903ccd8117e91b9d13bf031a7b88287e7276
Reviewed-on: https://swiftshader-review.googlesource.com/7250Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>