staging: comedi: cb_pcidas64: remove unused pr_fmt() macro

This macro is not used. 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/cb_pcidas64.c

@@ -80,8 +80,6 @@
 	make ao fifo size adjustable like ai fifo
 */
 
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/delay.h>