remove unset logo variable

metadata.php

@@ -41,7 +41,7 @@ $aModule = [
     ],
     'thumbnail'   => 'picture.svg',
     'version'     => '2.0.2.0',
-    'author'      => $logo.' Data Development (Inh.: Thomas Dartsch)',
+    'author'      => '(D3) Data Development (Inh.: Thomas Dartsch)',
     'email'       => 'support@shopmodule.com',
     'url'         => 'https://www.oxidmodule.com/',
     'controllers' => [