drm/i915: remove intel_gvt_irq::pending_events

intel_gvt_irq::pending_events was never used since its addition in
commit c8fe6a68 (drm/i915/gvt: vGPU interrupt virtualization.).
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/20240216065326.6910-19-jirislaby@kernel.org

drivers/gpu/drm/i915/gvt/interrupt.h

@@ -187,7 +187,6 @@ struct intel_gvt_irq {
 	struct intel_gvt_irq_info *info[INTEL_GVT_IRQ_INFO_MAX];
 	DECLARE_BITMAP(irq_info_bitmap, INTEL_GVT_IRQ_INFO_MAX);
 	struct intel_gvt_event_info events[INTEL_GVT_EVENT_MAX];
-	DECLARE_BITMAP(pending_events, INTEL_GVT_EVENT_MAX);
 	struct intel_gvt_irq_map *irq_map;
 };