diff --git a/internal/caches/storage_file.go b/internal/caches/storage_file.go
index 3c181a9..8ba5a0f 100644
--- a/internal/caches/storage_file.go
+++ b/internal/caches/storage_file.go
@@ -208,9 +208,6 @@ func (this *FileStorage) OpenReader(key string) (Reader, error) {
 	return this.openReader(key, true)
 }
 
-var cacheMap = map[string][]*os.File{}
-var cacheMapLocker = ysnc.
-
 func (this *FileStorage) openReader(key string, allowMemory bool) (Reader, error) {
 	// 先尝试内存缓存
 	if allowMemory && this.memoryStorage != nil {