media: staging: rkisp1: remove unused field alloc_ctx from struct rkisp1_device

The field alloc_ctx in struct rkisp1_device is not used.
This patch removes it.
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/rkisp1/rkisp1-common.h

@@ -264,7 +264,6 @@ struct rkisp1_device {
 	struct rkisp1_stats stats;
 	struct rkisp1_params params;
 	struct media_pipeline pipe;
-	struct vb2_alloc_ctx *alloc_ctx;
 	struct mutex stream_lock;
 	struct rkisp1_debug debug;
 };