removed unused imports economic

src/economic/storage.rs

@@ -2,9 +2,8 @@
 use super::types::*;
 use super::helpers::*;
 use tokio::fs;
-use chrono::{Local, NaiveDate, Datelike};
+use chrono::{NaiveDate, Datelike};
 use std::collections::HashMap;
-use std::path::Path;
 
 pub async fn scan_existing_chunks() -> anyhow::Result<Vec<ChunkInfo>> {
     let dir = std::path::Path::new("economic_events");
@@ -112,10 +111,4 @@ pub async fn save_changes(changes: &[EventChange]) -> anyhow::Result<()> {
         fs::write(&path, serde_json::to_string_pretty(&all)?).await?;
     }
     Ok(())
-}
-
-pub fn target_end_date() -> String {
-    let now = Local::now().naive_local().date();
-    let future = now + chrono::Duration::days(90);
-    future.format("%Y-%m-%d").to_string()
 }