[media] em28xx: remove unused ac97 v4l2_ctrl_handler

Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/usb/em28xx/em28xx.h

@@ -491,8 +491,6 @@ struct em28xx {
 
 	struct v4l2_device v4l2_dev;
 	struct v4l2_ctrl_handler ctrl_handler;
-	/* provides ac97 mute and volume overrides */
-	struct v4l2_ctrl_handler ac97_ctrl_handler;
 	struct em28xx_board board;
 
 	/* Webcam specific fields */