staging: comedi: addi_apci_1516: remove unused define

The COMEDI_SUBD_TTLIO define is not used by this driver. Remove it.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/addi_apci_1516.c

@@ -4,10 +4,6 @@
 
 #include "addi-data/addi_common.h"
 
-#ifndef COMEDI_SUBD_TTLIO
-#define COMEDI_SUBD_TTLIO   11	/* Digital Input Output But TTL */
-#endif
-
 #include "addi-data/hwdrv_apci1516.c"
 
 static const struct addi_board apci1516_boardtypes[] = {