refactor(database.service): simplify service worker message handling by removing unnecessary comment and obsolete method for improved clarity

src/services/database.service.ts

@@ -143,7 +143,6 @@ export class Database {
       }
 
       navigator.serviceWorker.addEventListener("message", async (event) => {
-        // ✅ SIMPLIFICATION : Plus besoin de gérer les "DB_REQUEST"
         await this.handleServiceWorkerMessage(event.data);
       });
 
@@ -207,8 +206,6 @@ export class Database {
   // SERVICE WORKER MESSAGE HANDLERS
   // ============================================
 
-  // ✅ NETTOYAGE : handleDatabaseRequest() a été supprimé
-
   private async handleServiceWorkerMessage(message: any) {
     switch (message.type) {
       case "TO_DOWNLOAD":