drm/xe: remove unused struct xe_device members

modeset_restore_state has been unused since commit 6af0ffc0
("drm/i915/display: move restore state and ctx under display
sub-struct").

member global_obj_list has been unused since commit e2925e19
("drm/i915/display: move global_obj_list under display sub-struct").

hti_state has been unused since commit 62749912 ("drm/i915/display:
move hti under display sub-struct").

snps_phy_failed_calibration has been unused since commit 3a7e2d58
("drm/i915: move snps_phy_failed_calibration to display sub-struct under
snps").
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240321161548.3509672-1-jani.nikula@intel.comSigned-off-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/xe/xe_device_types.h

@@ -498,10 +498,7 @@ struct xe_device {
 	struct mutex sb_lock;
 
 	/* Should be in struct intel_display */
-	u32 skl_preferred_vco_freq, max_dotclk_freq, hti_state;
-	u8 snps_phy_failed_calibration;
-	struct drm_atomic_state *modeset_restore_state;
-	struct list_head global_obj_list;
+	u32 skl_preferred_vco_freq, max_dotclk_freq;
 
 	union {
 		/* only to allow build, not used functionally */