staging: comedi: dt9812: remove pr_fmt()

There are no pr_{level} messages in this driver. Remove the pr_fmt().
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/dt9812.c

@@ -38,8 +38,6 @@ for my needs.
  *      says P1).
  */
 
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/init.h>