Fix CI (#1662)

Author: domenukk

libafl/src/monitors/mod.rs

@@ -21,7 +21,7 @@ use core::{fmt, fmt::Write, time::Duration};
 #[cfg(feature = "std")]
 pub use disk::{OnDiskJSONMonitor, OnDiskTOMLMonitor};
 use hashbrown::HashMap;
-use libafl_bolts::{current_time, format_duration_hms, ClientId, Error};
+use libafl_bolts::{current_time, format_duration_hms, ClientId};
 use serde::{Deserialize, Serialize};
 
 #[cfg(feature = "afl_exec_sec")]