f Add #[allow(clippy::bool_comparison)] to shut up lint

.. no, thanks, linter. Yes, I really want to highlight the return value
here.

lightning-liquidity/src/lsps2/service.rs

@@ -1289,6 +1289,7 @@ where
 		}
 	}
 
+	#[allow(clippy::bool_comparison)]
 	pub(crate) fn prune_peer_state(&self) {
 		let mut outer_state_lock = self.per_peer_state.write().unwrap();
 		outer_state_lock.retain(|_, inner_state_lock| {