drm/xe/guc: Drop ancient GuC CTB definitions

Those definitions were applicable for old GuC firmwares only.

Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: #741
Link: https://lore.kernel.org/r/20231128203203.1147-1-michal.wajdeczko@intel.com


Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>