Remove superfluous requires

tests/lib/SimpleSAML/Metadata/SAMLParserTest.php

@@ -2,8 +2,6 @@
 
 namespace SimpleSAML\Test\Metadata;
 
-require_once(__DIR__ . '/../../../SigningTestCase.php');
-
 use PHPUnit\Framework\TestCase;
 use RobRichards\XMLSecLibs\XMLSecurityDSig;
 use SimpleSAML\XML\Signer;

tests/lib/SimpleSAML/XML/SignerTest.php

@@ -8,8 +8,6 @@ use SimpleSAML\Configuration;
 use SimpleSAML\Test\SigningTestCase;
 use SimpleSAML\XML\Signer;
 
-require_once(__DIR__ . '/../../../SigningTestCase.php');
-
 /**
  * Tests for SimpleSAML\XML\Signer.
  */

tests/lib/SimpleSAML/XML/ValidatorTest.php

@@ -2,8 +2,6 @@
 
 namespace SimpleSAML\Test\XML;
 
-require_once(__DIR__ . '/../../../SigningTestCase.php');
-
 use org\bovigo\vfs\vfsStream;
 use PHPUnit\Framework\TestCase;
 use SimpleSAML\Test\SigningTestCase;