Clean up OpenRouterService

backend/src/main/java/com/petshop/backend/service/OpenRouterService.java

@@ -45,8 +45,6 @@ public class OpenRouterService {
                     .uri(URI.create(OPENROUTER_URL))
                     .header("Content-Type", "application/json")
                     .header("Authorization", "Bearer " + apiKey)
-                    .header("HTTP-Referer", "https://petshop.local")
-                    .header("X-Title", "Leon's Pet Store AI Assistant")
                     .POST(HttpRequest.BodyPublishers.ofString(requestBody))
                     .timeout(Duration.ofSeconds(60))
                     .build();
@@ -63,12 +61,7 @@ public class OpenRouterService {
         catch (InterruptedException e) {
             Thread.currentThread().interrupt();
             throw new RuntimeException("AI request was interrupted", e);
-        } 
-        
-        catch (RuntimeException e) {
-            throw e;
-        } 
-        
+        }
         catch (Exception e) {
             throw new RuntimeException("Failed to call OpenRouter API: " + e.getMessage(), e);
         }