Property struct is not being used so remove it and related dead code.

Fixes: ddfa2d6a ("drm/xe/uapi: Kill VM_MADVISE IOCTL")
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: intel-xe@lists.freedesktop.org
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240311151159.10036-1-nirmoy.das@intel.comSigned-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
(cherry picked from commit 002d8f0b)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>