Utilize confy for reading and saving history

src/bot.rs

@@ -96,10 +96,7 @@ pub(crate) async fn run(data: Arc<RwLock<SharedData>>) {
 
         {
             let mut write = data.write().await;
-            write.post_history = match SeriesHistory::load_history() {
-                Ok(data) => data,
-                Err(_) => continue,
-            };
+            write.post_history = SeriesHistory::load_history();
         }
 
         {
@@ -243,14 +240,7 @@ async fn handle_series(
         series_history.set_part(post_part_info.as_string().as_str(), part_history);
         let mut write = data.write().await;
         write.post_history.set_series(series.slug.as_str(), series_history);
-        let _ = match write.post_history.save_history() {
-            Ok(data) => data,
-            Err(e) => {
-                let err_msg = format!("{e}");
-                write_error(err_msg);
-                return Err(())
-            }
-        };
+        write.post_history.save_history();
     }
     Ok(())
 }