iio: remove unneeded assignment in __iio_format_value

Trivial cleanup in __iio_format_value() for the IIO_VAL_FRACTIONAL case
where tmp1 = vals[1] assignment is unneeded and irrelevant since tmp1 is
immediately overwritten by the subsequent div_s64_rem() call.
Signed-off-by: Matteo Martelli <matteomartelli3@gmail.com>
Link: https://patch.msgid.link/20240730-iio-clean-fmt-value-v1-1-3e1c3deafc33@gmail.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/industrialio-core.c

@@ -667,7 +667,6 @@ static ssize_t __iio_format_value(char *buf, size_t offset, unsigned int type,
 					     vals[1]);
 	case IIO_VAL_FRACTIONAL:
 		tmp2 = div_s64((s64)vals[0] * 1000000000LL, vals[1]);
-		tmp1 = vals[1];
 		tmp0 = (int)div_s64_rem(tmp2, 1000000000, &tmp1);
 		if ((tmp2 < 0) && (tmp0 == 0))
 			return sysfs_emit_at(buf, offset, "-0.%09u", abs(tmp1));