V4L/DVB (5750): Remove obsoleted support for PROC_FS on vicam.c

Procfs support on V4L were converted to sysfs support by a pre-2.6 patch:

	http://www.ussg.iu.edu/hypermail/linux/kernel/0307.1/2356.html



There's no sense on keeping the dead code inside vicam.c. Also,it won't
work anyway, as part of proc_fs support were previously inside
videodev.c.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>