regulator: tps80031: Remove unused *rdev from struct tps80031_regulator

The ri-rdev is assigend but not used, so remove it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/tps80031-regulator.c

@@ -85,7 +85,6 @@ struct tps80031_regulator_info {
 
 struct tps80031_regulator {
 	struct device			*dev;
-	struct regulator_dev		*rdev;
 	struct tps80031_regulator_info	*rinfo;
 
 	u8				device_flags;
@@ -736,7 +735,6 @@ static int tps80031_regulator_probe(struct platform_device *pdev)
 					ri->rinfo->desc.name);
 			return PTR_ERR(rdev);
 		}
-		ri->rdev = rdev;
 	}
 
 	platform_set_drvdata(pdev, pmic);