staging: comedi: cb_pcidda: cleanup the private data

Remove the unused variables in the private data. Also remove
the cut-and-paste comment from the skel driver.
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_pcidda.c

@@ -203,20 +203,9 @@ static const struct cb_pcidda_board cb_pcidda_boards[] = {
 	 },
 };
 
-/*
- * this structure is for data unique to this hardware driver.  If
- * several hardware drivers keep similar information in this structure,
- * feel free to suggest moving the variable to the struct comedi_device
- * struct.
- */
 struct cb_pcidda_private {
-	int data;
-
 	unsigned long digitalio;
 
-	/* unsigned long control_status; */
-	/* unsigned long adc_fifo; */
-
 	/* bits last written to da calibration register 1 */
 	unsigned int dac_cal1_bits;
 	/* current range settings for output channels */