iio: core: drop devm_iio_triggered_buffer_cleanup() API call

It's unused so far, so it can be removed. Also makes sense to remove it
to discourage weird uses of this call during review.

Signed-off-by: Alexandru Ardelean <[e-mail]>
Signed-off-by: Jonathan Cameron <[e-mail]>

Documentation/driver-api/driver-model/devres.rst

···
   devm_iio_kfifo_allocate()
   devm_iio_kfifo_free()
   devm_iio_triggered_buffer_setup()
-  devm_iio_triggered_buffer_cleanup()
   devm_iio_trigger_alloc()
   devm_iio_trigger_free()
   devm_iio_trigger_register()

drivers/iio/buffer/industrialio-triggered-buffer.c

···
 }
 EXPORT_SYMBOL_GPL(devm_iio_triggered_buffer_setup);
 
-void devm_iio_triggered_buffer_cleanup(struct device *dev,
-				       struct iio_dev *indio_dev)
-{
-	int rc;
-
-	rc = devres_release(dev, devm_iio_triggered_buffer_clean,
-			    devm_iio_device_match, indio_dev);
-	WARN_ON(rc);
-}
-EXPORT_SYMBOL_GPL(devm_iio_triggered_buffer_cleanup);
-
 MODULE_AUTHOR("Lars-Peter Clausen <[e-mail]>");
 MODULE_DESCRIPTION("IIO helper functions for setting up triggered buffers");
 MODULE_LICENSE("GPL");

include/linux/iio/triggered_buffer.h

···
 				    irqreturn_t (*h)(int irq, void *p),
 				    irqreturn_t (*thread)(int irq, void *p),
 				    const struct iio_buffer_setup_ops *ops);
-void devm_iio_triggered_buffer_cleanup(struct device *dev,
-				       struct iio_dev *indio_dev);
 
 #endif