Clean up interface

src/Packagist/WebBundle/Repository/RepositoryProviderInterface.php

@@ -6,7 +6,5 @@ use Packagist\WebBundle\Repository\Provider\ProviderInterface;
 
 interface RepositoryProviderInterface
 {
-    public function addProvider(ProviderInterface $provider);
-
     public function getRepository($url);
 }