iio: humidity: remove duplicated include from hts221_buffer.c

Remove duplicated include.
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/humidity/hts221_buffer.c

@@ -15,7 +15,6 @@
 
 #include <linux/iio/iio.h>
 #include <linux/iio/trigger.h>
-#include <linux/interrupt.h>
 #include <linux/iio/events.h>
 #include <linux/iio/trigger_consumer.h>
 #include <linux/iio/triggered_buffer.h>