drm: xlnx: zynqmp_dpsub: Drop unused zynqmp_disp.event field

The event field of the zynqmp_disp structure is unused. Drop it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

drivers/gpu/drm/xlnx/zynqmp_disp.c

@@ -171,7 +171,6 @@ struct zynqmp_disp_layer {
  * @audio.clk: Audio clock
  * @audio.clk_from_ps: True of the audio clock comes from PS, false from PL
  * @layers: Layers (planes)
- * @event: Pending vblank event request
  * @pclk: Pixel clock
  * @pclk_from_ps: True of the video clock comes from PS, false from PL
  */
@@ -196,8 +195,6 @@ struct zynqmp_disp {
 
 	struct zynqmp_disp_layer layers[ZYNQMP_DISP_NUM_LAYERS];
 
-	struct drm_pending_vblank_event *event;
-
 	struct clk *pclk;
 	bool pclk_from_ps;
 };