V4L/DVB (12455): radio-typhoon: remove obsolete RADIO_TYPHOON_PROC_FS config option

Thanks to Robert P.J. Day for finding this.

Thanks-to: Robert P.J. Day <rpjday@crashcourse.ca>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>