Remove unused use-statement

Author: tvdijen

src/Binding.php

@@ -5,7 +5,6 @@
 namespace SimpleSAML\SAML2;
 
 use Psr\Http\Message\{ResponseInterface, ServerRequestInterface};
-use SimpleSAML\SAML2\Assert\Assert;
 use SimpleSAML\SAML2\Binding\{HTTPArtifact, HTTPPost, HTTPRedirect, SOAP};
 use SimpleSAML\SAML2\Constants as C;
 use SimpleSAML\SAML2\Exception\Protocol\UnsupportedBindingException;