fix for:
```
error: using `clone` on type `[u8; 32]` which implements the `Copy`
trait
--> xcm/xcm-builder/src/routing.rs:44:28
|
44 | message.0.push(SetTopic(unique_id.clone()));
| ^^^^^^^^^^^^^^^^^ help: try
removing the `clone` call: `unique_id`
|
= help: for further information visit
https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
= note: `-D clippy::clone-on-copy` implied by `-D clippy::complexity`
```