Just remove unused imports

Author: DanGould

payjoin/src/core/send/v1.rs

@@ -28,8 +28,6 @@ use url::Url;
 
 use super::*;
 pub use crate::output_substitution::OutputSubstitution;
-#[allow(unused_imports)]
-use crate::psbt::PsbtExt;
 pub use crate::MAX_CONTENT_LENGTH;
 use crate::{PjUri, Request};