fix: Remove dummy exception from test

src/test/java/de/mlessmann/certassist/TestOpenSSLCertificateCreator.java

@@ -31,6 +31,5 @@ public class TestOpenSSLCertificateCreator {
         try (var cert = openSSLCertificateCreator.createCertificate(certRequest)) {
             System.out.println("Certificate created: " + cert);
         }
-        throw new RuntimeException("Test not implemented");
     }
 }