iio: gp2ap020a00f: Remove code to set trigger parent

iio_trigger_set_drvdata() sets the trigger device parent to first
argument of viio_trigger_alloc(), no need to do it again in the driver
code.

Given data->client is client, and we call devm_iio_trigger_alloc() with
&client->dev, we do not have to set data->trig->dev.parent to
&data->client->dev anymore.

Signed-off-by: Gwendal Grignou <[e-mail]>
Reviewed-by: Andy Shevchenko <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/light/gp2ap020a00f.c

···
 	}
 
 	data->trig->ops = &gp2ap020a00f_trigger_ops;
-	data->trig->dev.parent = &data->client->dev;
 
 	init_irq_work(&data->work, gp2ap020a00f_iio_trigger_work);