Add captcha image generation functionality.

app/Http/Controllers/Controller.php

@@ -1,12 +0,0 @@
-<?php
-
-namespace App\Http\Controllers;
-
-use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
-use Illuminate\Foundation\Validation\ValidatesRequests;
-use Illuminate\Routing\Controller as BaseController;
-
-class Controller extends BaseController
-{
-    use AuthorizesRequests, ValidatesRequests;
-}