media: staging: media: imx: remove commented code

The virtual channel is always treated as 0 once the stream enters
CSI's. Commented code in the "#if 0" can be safely removed as it will
not serve any purpose in future.  Issue reported by checkpatch script.

Signed-off-by: Deepak R Varma <mh12gx2825@gmail.com>
Acked-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>