staging: comedi: dt3000: remove DEBUG define

This define unables some debug code that prints the status flags
during the interrupt handler. These messages are just added noise
and it's probably not a good idea to spew them during the interrupt
anyway.

Remove the DEBUG define as well as the debug code.

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>