eeprom: at24: Remove set but not used variable 'addr'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/misc/eeprom/at24.c: In function at24_make_dummy_client:
drivers/misc/eeprom/at24.c:514:21: warning: variable addr set but not used [-Wunused-but-set-variable]

It's not used since commit e7308628d0 ("eeprom:
at24: use devm_i2c_new_dummy_device()")

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

drivers/misc/eeprom/at24.c

@@ -511,13 +511,11 @@ static int at24_make_dummy_client(struct at24_data *at24, unsigned int index,
 				  struct regmap_config *regmap_config)
 {
 	struct i2c_client *base_client, *dummy_client;
-	unsigned short int addr;
 	struct regmap *regmap;
 	struct device *dev;
 
 	base_client = at24->client[0].client;
 	dev = &base_client->dev;
-	addr = base_client->addr + index;
 
 	dummy_client = devm_i2c_new_dummy_device(dev, base_client->adapter,
 						 base_client->addr + index);