staging: comedi: addi_apci_035: remove driver

According to ADDI-DATA, this board was discontinued last year and they
feel that no further development is needed for this driver. Remove the
driver from comedi to help with the addi-data cleanup.

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>