Fix PHPStan booleanAnd.leftAlwaysTrue errors

- RedisQueue: Remove redundant $this->container check (already non-nullable)
- ThrottlesExceptions: Fix PHPDoc @var callable to @var ?callable for
  $reportCallback and $whenCallback (properties can be null)

Author: binaryfire

src/horizon/src/RedisQueue.php

@@ -150,7 +150,7 @@ public function deleteAndRelease(string $queue, RedisJob $job, DateInterval|Date
      */
     protected function event(string $queue, mixed $event): void
     {
-        if ($this->container && $this->container->has(Dispatcher::class)) {
+        if ($this->container->has(Dispatcher::class)) {
             $queue = Str::replaceFirst('queues:', '', $queue);
 
             $this->container->get(Dispatcher::class)->dispatch(

src/queue/src/Middleware/ThrottlesExceptions.php

@@ -28,14 +28,14 @@ class ThrottlesExceptions
     /**
      * The callback that determines if the exception should be reported.
      *
-     * @var callable
+     * @var ?callable
      */
     protected $reportCallback;
 
     /**
      * The callback that determines if rate limiting should apply.
      *
-     * @var callable
+     * @var ?callable
      */
     protected $whenCallback;