Removed invalid uses.

Author: erickr

spec/Request/HandlerSpec.php

@@ -2,7 +2,6 @@
 
 namespace spec\Xabbuh\XApi\Client\Request;
 
-use Http\Message\RequestFactory;
 use PhpSpec\ObjectBehavior;
 use Psr\Http\Client\ClientInterface;
 use Psr\Http\Message\RequestFactoryInterface;

spec/XApiClientBuilderSpec.php

@@ -4,7 +4,6 @@
 
 use Http\Discovery\HttpClientDiscovery;
 use Http\Discovery\MessageFactoryDiscovery;
-use Http\Message\RequestFactory;
 use PhpSpec\Exception\Example\SkippingException;
 use PhpSpec\ObjectBehavior;
 use Psr\Http\Client\ClientInterface;