swr: Remove a bunch of default handling of pipe caps.

u_screen will return 0 for all of these, which means that this is one
less driver to see in git grep when I'm checking who exposes a cap.

Reviewed-by: Jan Zielinski <jan.zielinski@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3298>
1 file changed