tau/taud/mont_tasks: clippy chore

bin/tau/taud/src/month_tasks.rs

@@ -180,10 +180,7 @@ impl MonthTasks {
                 Err(_) => Self::create(date, dataset_path),
             },
             None => {
-                let path_all = match Self::get_all(dataset_path) {
-                    Ok(t) => t,
-                    Err(_) => vec![],
-                };
+                let path_all = Self::get_all(dataset_path).unwrap_or_default();
 
                 let mut loaded_mt = Self::new(&[], &[]);