drm/xe: Drop remove callback support

Now that devres supports component driver cleanup during driver removal
cleanup, the xe custom support for removal callbacks is not needed
anymore. Drop it.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250222001051.3012936-7-lucas.demarchi@intel.com


Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>