Forgot to run 'composer install'

vendor/simplesamlphp/simplesamlphp/config/authsources.php

@@ -15,10 +15,8 @@
     // and Shibboleth 1.3 IdPs.
     'default-sp' => array(
         'saml:SP',
-        'privatekey' => 'sp-key-old.pem',
-        'certificate' => 'sp-cert-old.crt',
-        'new_privatekey' => 'sp-key.pem',
-        'new_certificate' => 'sp-cert.crt',
+        'privatekey' => 'sp-key.pem',
+        'certificate' => 'sp-cert.crt',
 
         // The entity ID of this SP.
         // Can be NULL/unset, in which case an entity ID is generated based on the metadata URL.