fix linting

Author: joedixon

src/Servers/Reverb/Publishing/RedisClient.php

@@ -161,14 +161,6 @@ protected function configureClientErrorHandler(): void
         });
     }
 
-    /**
-     * Queue the given subscription event.
-     */
-    protected function queueSubscriptionEvent($event, $payload): void
-    {
-        $this->queuedSubscriptionEvents[] = [$event => $payload];
-    }
-
     /**
      * Queue the given publish event.
      */