fix unused data deletion issue

LeStorage/SyncedCollection.swift

@@ -337,10 +337,8 @@ public class SyncedCollection<T : SyncedStorable>: SomeSyncedCollection, Collect
     }
     
     func deleteUnusedGranted(instance: T) {
-        
         guard instance.sharing != nil else { return }
-        
-        self.delete(instance: instance)
+        self.deleteNoSyncNoCascade(id: instance.stringId)
         instance.deleteUnusedSharedDependencies(store: self.store)
     }