commented unused function

src/corporate/storage.rs

@@ -178,7 +178,7 @@ pub async fn save_prices_by_source(
 }
 
 /// Update available_exchanges.json with fetch results
-pub async fn update_available_exchange(
+/*pub async fn update_available_exchange(
     paths: &DataPaths,
     isin: &str,
     ticker: &str,
@@ -205,7 +205,7 @@ pub async fn update_available_exchange(
     }
 
     save_available_exchanges(paths, isin, exchanges).await
-}
+}*/
 
 /// Infer currency from ticker suffix
 fn infer_currency_from_ticker(ticker: &str) -> String {