atomisp: remove a now unused var

A previous cleanup patch removed the usage of the ret var.

So, drop it.

Link: https://lore.kernel.org/linux-media/a03a4a3e9aad2b8154018c323cf7766266990724.1616430113.git.mchehab+huawei@kernel.orgSigned-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/i2c/atomisp-lm3554.c

@@ -904,7 +904,6 @@ static int lm3554_remove(struct i2c_client *client)
 {
 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
 	struct lm3554 *flash = to_lm3554(sd);
-	int ret;
 
 	media_entity_cleanup(&flash->sd.entity);
 	v4l2_ctrl_handler_free(&flash->ctrl_handler);