web-api: fix duplicate const spd declaration in JS

router/route-web-api.py

@@ -1176,7 +1176,6 @@ function renderCheck(data) {
   }
 
   // Speed test (file URL)
-  const spd = data.speed || {};
   if (Object.keys(spd).length) {
     const ssec = mkDiv('check-section');
     const fname = (data.file_url || '').split('/').pop().split('?')[0];