Remove unused use statements

Author: aderuwe

src/Omnipay/Common/GatewayFactory.php

@@ -15,7 +15,6 @@
 use RecursiveIteratorIterator;
 use ReflectionClass;
 use Guzzle\Http\ClientInterface;
-use Guzzle\Http\Client as HttpClient;
 use Omnipay\Common\Exception\RuntimeException;
 use Symfony\Component\HttpFoundation\Request as HttpRequest;
 

src/Omnipay/Common/Message/AbstractResponse.php

@@ -12,7 +12,6 @@
 namespace Omnipay\Common\Message;
 
 use Omnipay\Common\Exception\RuntimeException;
-use Omnipay\Common\Message\RequestInterface;
 use Symfony\Component\HttpFoundation\RedirectResponse as HttpRedirectResponse;
 use Symfony\Component\HttpFoundation\Response as HttpResponse;