Study states have never been used and are not needed. Remove them.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>