staging: comedi: rtd520: remove utcGate from private data

This variable in the private data is not used. Remove it.
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: NIan Abbott <abbotti@mev.co.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/rtd520.c

@@ -409,9 +409,6 @@ struct rtdPrivate {
 	/* read back data */
 	unsigned int aoValue[2];	/* Used for AO read back */
 
-	/* timer gate (when enabled) */
-	u8 utcGate[4];		/* 1 extra allows simple range check */
-
 	unsigned fifoLen;
 };