media: staging: media: imx: imx7-media-csi: Drop usage of shared helpers

None of the shared helpers are used anymore. Make this official by
dropping inclusion of imx-media.h.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Rui Miguel Silva <rmfrfs@gmail.com>
Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/imx/imx7-media-csi.c

@@ -28,8 +28,6 @@
 #include <media/v4l2-subdev.h>
 #include <media/videobuf2-dma-contig.h>
 
-#include "imx-media.h"
-
 #define IMX7_CSI_PAD_SINK		0
 #define IMX7_CSI_PAD_SRC		1
 #define IMX7_CSI_PADS_NUM		2