Not sure if this was intentionally left when block_check_for_allowed_instrs's
param was changed from bool to int, but it certainly was broken without the
previous commit for discards. Now those should work, so the (unintentional?)
special case can be removed.
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33590>
c31fadd25e