staging: comedi: cb_pcimdas: remove commented out irq init code

This driver does not have interrupt support. Remove the commented out
code that requests the irq.

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>