fix: Restored the onFailure callback

It was causing issues when trying to throw the exception and output the std_err file content.

src/Listeners/ExecuteJobFailureCallback.php

@@ -6,11 +6,6 @@ use Dterumal\LaravelCluster\Events\JobFailed;
 
 class ExecuteJobFailureCallback
 {
-    /**
-     * @var string
-     */
-    public string $exception = 'Job failed';
-
     /**
      * Handle the event.
      *
@@ -21,16 +16,8 @@ class ExecuteJobFailureCallback
     {
         $jobClass = $event->job->job;
 
-        try {
-            if (file_exists($this->job->std_err_path)) {
-                $this->exception = file_get_contents($this->job->std_err_path);
-            }
-
-            throw new \Exception($this->exception);
-        } catch (\Throwable $e) {
         if (method_exists($jobClass, 'onFailure')) {
-                $jobClass->onFailure($event->job, $e);
-            }
+            $jobClass->onFailure($event->job);
         }
     }
 }