updated travis.yml

Author: DavertMik

.travis.yml

@@ -1,8 +1,9 @@
 language: php
 
 php:
-  - 5.6
   - 7.0
+  - 7.1
+  - 7.2
 
 before_script:
   - stty cols 160

src/AspectMock/Proxy/ClassProxy.php

@@ -1,8 +1,6 @@
 <?php
 namespace AspectMock\Proxy;
-use AspectMock\Test;
 use AspectMock\Core\Registry;
-use PHPUnit_Framework_Assert as a;
 
 /**
  * ClassProxy represents a class of your project.