fix: remove unused import

Author: samparsky

primitives/src/channel.rs

@@ -7,7 +7,6 @@ use serde::{Deserialize, Deserializer, Serialize};
 use serde_hex::{SerHex, StrictPfx};
 
 use crate::big_num::BigNum;
-use crate::sentry::Event;
 use crate::{AdUnit, EventSubmission, TargetingTag, ValidatorDesc, ValidatorId};
 use hex::{FromHex, FromHexError};
 use std::ops::Deref;