fix clippy

Author: chirizxc

src/conversions/num_bigint.rs

@@ -281,9 +281,7 @@ fn int_to_u32_vec<const SIGNED: bool>(long: &Bound<'_, PyInt>) -> PyResult<Vec<u
         // SAFETY: `n_bytes_unsigned <= isize::MAX` (try_into above) and
         // `n_digits * 4 <= n_bytes_unsigned + 3`
         #[expect(clippy::checked_conversions)]
-        unsafe {
-            core::hint::assert_unchecked(n_digits * 4 <= isize::MAX as usize)
-        };
+        core::hint::assert_unchecked(n_digits * 4 <= isize::MAX as usize)
         ffi::PyLong_AsNativeBytes(
             long.as_ptr().cast(),
             buffer.as_mut_ptr().cast(),