Issue #3146474 by shaktik, kiamlaluno: Remove Unused variable $next from...

Issue #3146474 by shaktik, kiamlaluno: Remove Unused variable $next from AggregatorController.php file

(cherry picked from commit 5866d881)

core/modules/aggregator/src/Controller/AggregatorController.php

@@ -125,7 +125,7 @@ public function adminOverview() {
         $next_update = $this->t('imminently');
       }
       elseif ($last_checked && $refresh_rate) {
-        $next_update = $next = $this->t('%time left', ['%time' => $this->dateFormatter->formatInterval($last_checked + $refresh_rate - REQUEST_TIME)]);
+        $next_update = $this->t('%time left', ['%time' => $this->dateFormatter->formatInterval($last_checked + $refresh_rate - REQUEST_TIME)]);
       }
       else {
         $next_update = $this->t('never');