ldc-loue/app/Http/Requests/Bo/Sliders/UpdateSliderRequest.php

<?php

namespace App\Http\Requests\Bo\Sliders;

class UpdateSliderRequest extends StoreSliderRequest
{
    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        $rules = parent::rules();
        unset($rules['type']);
        return $rules;
    }
}