pan/bi: Remove assert(bi_is_ssa(dest))

Prior to register allocation, destinations must be in SSA form, except for the
"fake SSA" briefly used in the current RA (for which bi_is_ssa returns true
anyway). These asserts duplicate the asserts in the validator. If there's any
coverage lost here, that's just a sign the validator needs to run more often.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17794>
2 files changed