iio: light: al3320a: Drop unused linux/of.h include

Nothing from linux/of.h used in this driver.
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240218173323.1023703-3-jic23@kernel.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/light/al3320a.c

@@ -15,7 +15,6 @@
 #include <linux/bitfield.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
-#include <linux/of.h>
 #include <linux/mod_devicetable.h>
 
 #include <linux/iio/iio.h>