drm/i915: remove intel_memory_region_ops::flags

intel_memory_region_ops::flags was never used since its addition in
commit 232a6eba (drm/i915: introduce intel_memory_region). Drop it.

Found by https://github.com/jirislaby/clang-struct.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240216065326.6910-22-jirislaby@kernel.org

drivers/gpu/drm/i915/intel_memory_region.h

@@ -50,8 +50,6 @@ enum intel_region_id {
 		for_each_if((mr) = (i915)->mm.regions[id])
 
 struct intel_memory_region_ops {
-	unsigned int flags;
-
 	int (*init)(struct intel_memory_region *mem);
 	int (*release)(struct intel_memory_region *mem);