fix: add missing Clone derive and clean up unused imports

Made-with: Cursor

src/irc_task.rs

@@ -3,7 +3,7 @@ use std::time::Duration;
 use futures_util::StreamExt;
 use irc::client::prelude::*;
 use tokio::sync::mpsc;
-use tracing::{error, info, warn};
+use tracing::{error, info};
 
 use crate::config::IrcConfig;
 use crate::events::{BridgeEvent, Source};