iris: remove additional pipe control done before hiz for older gens

The restriction found in removed comment is not found on new specs.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6593>
1 file changed