staging: comedi: adl_pci9118: remove PCI9118_PARANOIDCHECK code

The comment states that paramoid checks are broken. They also would only
work for 12-bit analog input samples.

Instead of fixing the paranoid checking just remove it to simplify the
driver a bit.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>