staging:iio:magnetometer: remove unused header magnet.h

Now all magnetomers are using iio_chan_spec there is no need for
the macros in magnet.h
Signed-off-by: NJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/magnetometer/magnet.h

-
-#include "../sysfs.h"
-
-/* Magnetometer types of attribute */
-
-#define IIO_DEV_ATTR_MAGN_X_OFFSET(_mode, _show, _store, _addr)	\
-	IIO_DEVICE_ATTR(magn_x_offset, _mode, _show, _store, _addr)
-
-#define IIO_DEV_ATTR_MAGN_Y_OFFSET(_mode, _show, _store, _addr)	\
-	IIO_DEVICE_ATTR(magn_y_offset, _mode, _show, _store, _addr)
-
-#define IIO_DEV_ATTR_MAGN_Z_OFFSET(_mode, _show, _store, _addr)	\
-	IIO_DEVICE_ATTR(magn_z_offset, _mode, _show, _store, _addr)
-
-#define IIO_DEV_ATTR_MAGN_X_SCALE(_mode, _show, _store, _addr)		\
-	IIO_DEVICE_ATTR(magn_x_scale, _mode, _show, _store, _addr)
-
-#define IIO_DEV_ATTR_MAGN_Y_SCALE(_mode, _show, _store, _addr)		\
-	IIO_DEVICE_ATTR(magn_y_scale, _mode, _show, _store, _addr)
-
-#define IIO_DEV_ATTR_MAGN_Z_SCALE(_mode, _show, _store, _addr)		\
-	IIO_DEVICE_ATTR(magn_z_scale, _mode, _show, _store, _addr)
-
-#define IIO_DEV_ATTR_MAGN_X(_show, _addr)				\
-	IIO_DEVICE_ATTR(magn_x_raw, S_IRUGO, _show, NULL, _addr)
-
-#define IIO_DEV_ATTR_MAGN_Y(_show, _addr)				\
-	IIO_DEVICE_ATTR(magn_y_raw, S_IRUGO, _show, NULL, _addr)
-
-#define IIO_DEV_ATTR_MAGN_Z(_show, _addr)				\
-	IIO_DEVICE_ATTR(magn_z_raw, S_IRUGO, _show, NULL, _addr)