refactor(integration) : drop unused bookstack shelf-id cache

src/Module/Integration/Infrastructure/Service/BookStackApiService.php

@@ -15,9 +15,6 @@ use Throwable;
 
 final class BookStackApiService
 {
-    /** @var array<int, int[]> */
-    private array $shelfBookCache = [];
-
     public function __construct(
         private readonly HttpClientInterface $httpClient,
         private readonly BookStackConfigurationRepositoryInterface $configRepository,
@@ -81,9 +78,6 @@ final class BookStackApiService
             $bookSlugs[$book['id']] = $book['slug'] ?? '';
         }
 
-        // Update cache for getShelfBookIds
-        $this->shelfBookCache[$shelfId] = $bookIds;
-
         $config  = $this->getConfiguration();
         $baseUrl = rtrim($config->getUrl() ?? '', '/');
         $trimmed = trim($query);
@@ -141,24 +135,6 @@ final class BookStackApiService
         return $this->request('GET', sprintf('/api/books/%d', $id));
     }
 
-    /**
-     * @return int[]
-     */
-    private function getShelfBookIds(int $shelfId): array
-    {
-        if (isset($this->shelfBookCache[$shelfId])) {
-            return $this->shelfBookCache[$shelfId];
-        }
-
-        $data  = $this->request('GET', sprintf('/api/shelves/%d', $shelfId));
-        $books = $data['books'] ?? [];
-
-        $ids                            = array_map(static fn (array $book): int => $book['id'], $books);
-        $this->shelfBookCache[$shelfId] = $ids;
-
-        return $ids;
-    }
-
     private function getConfiguration(): BookStackConfiguration
     {
         $config = $this->configRepository->findSingleton();