refactor: remove commented interface in storage.service.ts

**Motivations :**
- Supprimer le code mort (interface commentée)

**Modifications :**
- Supprimer l'interface TestResponse commentée dans storage.service.ts

**Pages affectées :**
- src/services/storage.service.ts (supprime interface commentée)

src/services/storage.service.ts

@@ -106,11 +106,6 @@ export async function retrieveData(servers: string[], key: string): Promise<Arra
   return null;
 }
 
-// interface TestResponse { // Unused interface
-//   key: string;
-//   value: boolean;
-// }
-
 export async function testData(url: string, _key: string): Promise<boolean | null> {
   try {
     const response = await axios.get(url);