staging: comedi: s626: remove 'ChargeEnabled' from private data

This variable is never used in the driver. Just 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/s626.c

@@ -98,7 +98,6 @@ struct s626_private {
 	/* Pointer to logical adrs of DMA buffer used to hold DAC  data. */
 	uint16_t Dacpol;	/* Image of DAC polarity register. */
 	uint8_t TrimSetpoint[12];	/* Images of TrimDAC setpoints */
-	uint16_t ChargeEnabled;	/* Image of MISC2 Battery */
 	/* Charge Enabled (0 or WRMISC2_CHARGE_ENABLE). */
 	uint16_t WDInterval;	/* Image of MISC2 watchdog interval control bits. */
 	uint32_t I2CAdrs;
@@ -2667,12 +2666,6 @@ static void s626_initialize(struct comedi_device *dev)
 	for (chan = 0; chan < S626_DAC_CHANNELS; chan++)
 		SetDAC(dev, chan, 0);
 
-	/* Init image of WRMISC2 Battery Charger Enabled control bit.
-	 * This image is used when the state of the charger control bit,
-	 * which has no direct hardware readback mechanism, is queried.
-	 */
-	devpriv->ChargeEnabled = 0;
-
 	/* Init image of watchdog timer interval in WRMISC2.  This image
 	 * maintains the value of the control bits of MISC2 are
 	 * continuously reset to zero as long as the WD timer is disabled.