aco: drop leftover variable

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/8652
Fixes: 44fdd2ebcb27 ("aco: end reduce tmp after control flow, when used within control flow")

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Signed-off-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22011>
1 file changed