drm/omap: Nuke close hooks

Again since the core takes care of this we can remove them. While at
it also remove the postclose hook, it's empty.

v2: Laurent pointed me at even more code to delete.

v3: Remove unused flags (Tomi).

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1453756616-28942-9-git-send-email-daniel.vetter@ffwll.ch
diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index 2ed0754..d38fcbc 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -269,18 +269,7 @@
 		return;
 
 	spin_lock_irqsave(&dev->event_lock, flags);
-
-	list_del(&event->base.link);
-
-	/*
-	 * Queue the event for delivery if it's still linked to a file
-	 * handle, otherwise just destroy it.
-	 */
-	if (event->base.file_priv)
-		drm_crtc_send_vblank_event(crtc, event);
-	else
-		event->base.destroy(&event->base);
-
+	drm_crtc_send_vblank_event(crtc, event);
 	spin_unlock_irqrestore(&dev->event_lock, flags);
 }