[media] media-entity.h: get rid of revision and group_id fields

Both revision and group_id fields were never used and were always
initialized to zero. Remove them.

Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
4 files changed