Heimdall/app/Providers/EventServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;

class EventServiceProvider extends ServiceProvider
{
    /**
     * The event listener mappings for the application.
     *
     * @var array
     */
    protected $listen = [
        'App\Events\Event' => [
            'App\Listeners\EventListener',
        ],
    ];

    /**
     * Register any events for your application.
     */
    public function boot(): void
    {
        parent::boot();

        //
    }

    /**
     * Determine if events and listeners should be automatically discovered.
     */
    public function shouldDiscoverEvents(): bool
    {
        return false;
    }
}