iio: Remove unused declarations

Commit 0f3a8c3f34f7 ("iio: Add support for creating IIO devices via configfs")
declared but never implemented iio_sw_device_type_configfs_{un}register().
Commit b662f809d410 ("iio: core: Introduce IIO software triggers") declared but
never implemented iio_sw_trigger_type_configfs_{un}register().
Commit a3e0b51884ee ("iio: accel: add support for FXLS8962AF/FXLS8964AF accelerometers")
declared but never implemented fxls8962af_core_remove().
Commit 8dedcc3eee3a ("iio: core: centralize ioctl() calls to the main chardev")
declared but never implemented iio_device_ioctl().

Commit d430f3c36ca6 ("iio: imu: inv_mpu6050: Use regmap instead of i2c specific functions")
removed inv_mpu6050_write_reg() but not its declaration.

Signed-off-by: Yue Haibing <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/accel/fxls8962af.h

···
 };
 
 int fxls8962af_core_probe(struct device *dev, struct regmap *regmap, int irq);
-int fxls8962af_core_remove(struct device *dev);
 
 extern const struct dev_pm_ops fxls8962af_pm_ops;
 extern const struct regmap_config fxls8962af_i2c_regmap_conf;

drivers/iio/iio_core.h

···
 		      unsigned int cmd, unsigned long arg);
 };
 
-long iio_device_ioctl(struct iio_dev *indio_dev, struct file *filp,
-		      unsigned int cmd, unsigned long arg);
-
 void iio_device_ioctl_handler_register(struct iio_dev *indio_dev,
 				       struct iio_ioctl_handler *h);
 void iio_device_ioctl_handler_unregister(struct iio_ioctl_handler *h);

drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h

···
 int inv_mpu6050_prepare_fifo(struct inv_mpu6050_state *st, bool enable);
 int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en,
 			      unsigned int mask);
-int inv_mpu6050_write_reg(struct inv_mpu6050_state *st, int reg, u8 val);
 int inv_mpu_acpi_create_mux_client(struct i2c_client *client);
 void inv_mpu_acpi_delete_mux_client(struct i2c_client *client);
 int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,

include/linux/iio/sw_device.h

···
 struct iio_sw_device *iio_sw_device_create(const char *, const char *);
 void iio_sw_device_destroy(struct iio_sw_device *);
 
-int iio_sw_device_type_configfs_register(struct iio_sw_device_type *dt);
-void iio_sw_device_type_configfs_unregister(struct iio_sw_device_type *dt);
-
 static inline
 void iio_swd_group_init_type_name(struct iio_sw_device *d,
 				  const char *name,

include/linux/iio/sw_trigger.h

···
 struct iio_sw_trigger *iio_sw_trigger_create(const char *, const char *);
 void iio_sw_trigger_destroy(struct iio_sw_trigger *);
 
-int iio_sw_trigger_type_configfs_register(struct iio_sw_trigger_type *tt);
-void iio_sw_trigger_type_configfs_unregister(struct iio_sw_trigger_type *tt);
-
 static inline
 void iio_swt_group_init_type_name(struct iio_sw_trigger *t,
 				  const char *name,