removed phpunit 6 compatibility hack

Author: hiqsol

tests/_bootstrap.php

@@ -8,20 +8,6 @@
  * @copyright Copyright (c) 2016-2017, HiQDev (http://hiqdev.com/)
  */
 
-error_reporting(E_ALL & ~E_NOTICE);
+error_reporting(E_ALL);
 
 require_once __DIR__ . '/../vendor/autoload.php';
-
-/*
- * Ensures compatibility with PHPUnit 6.x
- */
-if (!class_exists('PHPUnit_Framework_Constraint') && class_exists('PHPUnit\Framework\Constraint\Constraint')) {
-    abstract class PHPUnit_Framework_Constraint extends \PHPUnit\Framework\Constraint\Constraint
-    {
-    }
-}
-if (!class_exists('PHPUnit_Framework_TestCase') && class_exists('PHPUnit\Framework\TestCase')) {
-    abstract class PHPUnit_Framework_TestCase extends \PHPUnit\Framework\TestCase
-    {
-    }
-}