media: i2c: tw9910: remove unused strust 'regval_list'

'regval_list' has been unused since
commit 398994c1e1 ("V4L/DVB (13666): tw9910: modify V/H outpit pin
setting to use VALID").

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/i2c/tw9910.c

@@ -212,11 +212,6 @@
  * structure
  */
 
-struct regval_list {
-	unsigned char reg_num;
-	unsigned char value;
-};
-
 struct tw9910_scale_ctrl {
 	char           *name;
 	unsigned short  width;