anv: Delete implicit CCS code

anv: Delete implicit CCS code

Stop allocating CCS at the end of some BOs. Anv no longer uses that
memory range.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jianxun Zhang <jianxun.zhang@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25003>