diff --git a/app/Http/Controllers/MarkController.php b/app/Http/Controllers/MarkController.php
index e0c206d97fca8005545f40e795c9bed3035e1492..c7259e18c3315d35ae536e11181b6cf4068d67c6 100644
--- a/app/Http/Controllers/MarkController.php
+++ b/app/Http/Controllers/MarkController.php
@@ -128,7 +128,6 @@ class MarkController extends Controller
 
     public function rankingCSV(string $label)
     {
-        $detector = $this->findDetector($label);
         $evidences = $this->server()->findEvidence($label);
         $now = \Carbon\Carbon::now();